Airworthiness directives: General Electric Co.,
[Federal Register: December 19, 2002 (Volume 67, Number 244)]
[Rules and Regulations]
[Page 77653-77666]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr19de02-2]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2001-NE-26-AD; Amendment 39-12984; AD 2002-25-08]
RIN 2120-AA64
Airworthiness Directives; General Electric Company (GE) CF6-45, - 50, -80A, -80C2, and -80E1 Turbofan Engines
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule.
SUMMARY: This amendment supersedes three existing airworthiness directives (AD's), that are applicable to GE CF6-45, -50, -80A, -80C2, and -80E1 turbofan engines. Those AD's currently require specific handling of the GE CF6 series high pressure compressor rotor (HPCR) stage 3-9 spools during a fluorescent penetrant inspection process, and initial and repetitive ultrasonic and eddy current inspections of certain HPCR stage 3-9 spools for cracks. This amendment removes the AD that requires special handling of the spools during fluorescent- penetrant inspection, and adjusts and combines the initial and repetitive inspection requirements, currently listed in two AD's, into one AD for the HPCR stage 3-9 spool. This amendment aligns repetitive inspection requirements with the more stringent initial inspection requirements mandated by AD 2000-16-12, Amendment 39-11868 (65 FR 50623, August 21, 2000) and terminates AD 95-18-14, Amendment 39-9361 (60 FR 46216, September 6, 1995) that is no longer necessary. The actions specified by this AD are intended to prevent cracks, which can cause separation of the HPCR stage 3-9 spool and possible uncontained engine failure.
DATES: Effective January 23, 2003. The incorporation by reference of certain publications listed in the regulations is approved by the Director of the Federal Register as of January 23, 2003.
ADDRESSES: The service information referenced in this AD may be obtained from General Electric Company via Lockheed Martin Technology Services, 10525 Chester Road, Suite C, Cincinnati, Ohio 45215, telephone (513) 672-8400, fax (513) 672-8422. This information may be examined, by appointment, at the Federal Aviation Administration (FAA), New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.
FOR FURTHER INFORMATION CONTACT: Chris Gavriel, Aerospace Engineer, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803-5299; telephone (781) 238-7147; fax (781) 238-7199.
SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) by superseding AD 95-18-14, Amendment 39-9361 (60 FR 46216, September 6, 1995); AD 99-24-15, Amendment 39-11440 (64 FR 66554, November 29, 1999); and AD 2000-16-12, Amendment 39-11868 (65 FR 50623, August 21, 2000); which are applicable to GE CF6-45, -50, -80A, -80C2, and -80E1 turbofan engines, was published in the Federal Register on June 12, 2002, (67 FR 40239). That action proposed to combine the requirements of AD 99-24-15 and AD 2000- 16-12 with the following additional changes to:
[sbull] Adopt the accelerated initial inspection requirements of AD 2000-16-12 to spools acquiring 7,000 cycles-since-new (CSN) or more in service after July 28, 2001,
[sbull] Relax initial compliance requirement for the CF6-45, -50, and CF6-80A 13-inch billet spools to make them consistent with 9 and 10-inch billet spools,
[sbull] Add repetitive inspection requirements to the existing one- time inspection requirement for the CF6-80C and -80E series engine spool web and hub-to-web transition areas,
[sbull] Replace engine shop visit inspection threshold limits for certain spools with cyclic limits,
[sbull] Add a time limit for slot bottom inspection for 13-inch billet spools for CF6-45, -50, -80A engines and for 9-inch and 10-inch billet spools for CF6-45, -50, -80A, and -80C engines,
[sbull] Add a time limit for the initial inspection and add repeat inspection intervals for stage 3-5 slot bottom inspection for certain spools,
[sbull] Add a time limit for one-time inspection of 8-inch billet 2-piece spools, and
[sbull] Provide for an alternative modular inspection for the slot bottoms.
[[Page 77654]]
The action was prompted by a report of an uncontained failure of an HPCR 3-9 spool.
The inspections must be done in accordance with the following GE alert service bulletins (ASB's):
[sbull] ASB GE CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002.
[sbull] ASB GE CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002.
[sbull] ASB GE CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002.
[sbull] ASB GE CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002.
[sbull] ASB GE CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002.
[sbull] ASB GE CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002.
[sbull] ASB GE CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002.
[sbull] ASB GE CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002.
[sbull] ASB GE CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002.
[sbull] ASB GE CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002.
[sbull] ASB GE CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002.
[sbull] ASB GE CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 2002.
Comments
Interested persons have been afforded an opportunity to participate in the making of this amendment. Due consideration has been given to the comments received.
Web Inspection May Require Unscheduled Removals of Engines
Several commenters state that inspection of the web per Alert Service Bulletin 72-A0848, after January 27, 2003, at 3,500 CSN is a decrease from inspection requirements prior to that date. The commenters feel that this requirement will force operators to remove engines off wing to do the inspection in order to comply with this proposed AD.
The FAA agrees. Based on information received from several commenters, this requirement will have an adverse economic and operational impact on several operators. We have reviewed a risk analysis that includes an extension of the web inspection requirement by six months, relative to the date proposed in the NPRM, and find that the new risk is still acceptable under the guidelines appropriate for this type of failure. As a result, the requirement has been extended by six months.
Request To Add a FAX Number for the Reporting Requirements
One commenter requests that a FAX number be added to the reporting requirements. Due to time differences around the world, the time allotted for reporting may not be sufficient for other means of communication
The FAA agrees. We have added a facsimile number to the reporting requirements.
Request To Make Editorial Changes to Wording in the Requirements of the AD
One commenter requests certain word changes, such as replacing ``by'' with ``at'', replacing ``within'' with ``before'', etc., and adding certain paragraph headings. These changes are requested to make the AD requirements consistent and more understandable.
The FAA partially agrees. We consider the consistency of wording and the readability of the requirements of the AD to be of highest concern. However, we also feel that many of the suggested changes are stylistic and do not affect the technical accuracy or readability of the AD. We have made some of the requested changes to ensure consistency among the requirements and to improve the readability of the requirements of the AD.
Requested Corrections to CF6-50 8-Inch Requirements
Several commenters request that the title for paragraph (d) be corrected from ``CF6-508-inch'' to ``CF6-50 8-inch.'' The same commenters also request that the FAA correct service bulletin identifications in paragraphs (f), (g), and (j).
The FAA agrees. The title for paragraph (d) and the service bulletin numbers in paragraphs (f), (g), and (j) have been corrected.
Request To Change the Definition of an Engine Shop Visit
Several commenters request that the definition of an engine shop visit be changed to exclude compressor top and bottom case removals for variable stator vane bushing replacements. The commenters feel the inclusion was made to add another condition to the conditions already identified as not constituting engine shop visits (ESV's).
The FAA agrees. We have changed the ESV definition paragraph to exclude the induction of an engine into the shop for the purpose of replacing the variable stator vane bushing.
Requested Clarification of the Requirements for Reinstallation of CF6- 50 Spools
One commenter feels that further explanation on the meaning of paragraph (c)(7) is needed.
The FAA agrees. Addition of a heading ``Spool Reinstallation Limit'' in this paragraph helps in clarifying the intent of this paragraph. Furthermore, as the paragraph states, an engine with a spool that has 10,500 CSN or more may not be installed (i.e. returned to service). The paragraph does not require the removal of an installed engine that has a spool with 10,500 CSN or more.
Request To Clarify Paragraph (a)(3)(ii) of This AD
One commenter requests clarification of paragraph (a)(3)(ii). The commenter feels that paragraph (a)(3)(ii) is necessary to do paragraphs (a)(3)(i) and (a)(3)(iii). The commenter feels that paragraphs (a)(3)(i) and (a)(3)(iii) are redundant to (a)(3)(ii) and can be deleted to simplify the requirements.
The FAA does not agree with deleting paragraphs (a)(3)(i) and (a)(3)(iii). A spool that is exposed as a piece part (paragraph (a)(3)(i)) is also exposed as a rotor (paragraph (a)(3)(ii)). Likewise, a spool that requires a hub inspection in accordance with ASB CF6-50 S/ B 72-A1108 hub inspection (paragraph (a)(3)(iii)) must be exposed at least to a rotor level {(a)(3)(ii){time} in order to do a module level inspection. In this sense, (a)(3)(i) and (a)(3)(iii) are redundant to (a)(3)(ii). However, each condition represents a common but distinct and different level of planned engine maintenance, therefore it was advisable to address each condition specifically for clarity.
Request To Clarify That Paragraph (a)(4)(iii) Is Correct
One commenter requests that the FAA verify that paragraph (a)(4)(iii) and Table 5 are correct. The commenter feels that Table 5 of the AD causes a jump in the inspection interval. The commenter provides a correction to Table 5 of the AD to correct a perceived error in that Table.
The FAA has not been able to confirm the commenter's findings. The cyclic intervals for the Table 5 requirements are A; 3,500 cycles, B; 3,000 cycles, C; 3,000 cycles, D; 2,500 cycles, E; 2,500 cycles, F; 2,000 cycles, and G; 2,000 cycles. These intervals are as intended.
Concern About Misinterpretation of the Inspection Deadline
One commenter states that one of the requirements of this proposed rule may be misread as extending the inspection deadline of AD 2000-16- 12 to beyond July 28, 2001. The commenter also suggests that if all the high-risk spools have been inspected, the proposed rule should be expedited, since one year has passed since the deadline of AD 2000-16- 12.
[[Page 77655]]
The FAA agrees with the commenter on the need to expedite issuance of this AD. While the statement in the Discussion Section of the preamble of the proposal may be misinterpreted, the preamble is not regulatory and in fact, even the structure of the preamble changes when an NPRM is converted into a final rule. However, we have made changes to the statement in the Supplementary Information section to clarify the intent of this final rule. The intent of the proposed rule is to apply the same requirement on the population of the spools that would acquire 7,000 CSN after July 28, 2001. In regard to the comment inquiring if all spools have been inspected, we are not aware of any spool with 7,000 CSN or more that has not been inspected as required by AD 2000-16-12.
Request To Include Fluorescent Penetrant Inspection (FPI) Requirements
One commenter suggests that AD 95-18-14 that addresses FPI of the 3-9 spool should be included, since Standard Practices are only a suggestion and not a law. The commenter makes this comment out of concern that under this proposed rule the benefit of an additional inspection is eliminated.
The FAA does not agree. The requirements promulgated by AD 95-18-14 ensure that a spool is properly wetted internally prior to the FPI. Although FPI of the 3-9 spool is desired for the areas not affected by this AD, FPI is not the best technique for the inspection program established by this AD. While FPI is effective only for detection of surface cracks, the combination of ultrasonic and eddy current inspections required by this AD provide both surface and subsurface inspections that are of equal or greater sensitivity than FPI. The FPI required by AD 95-18-14 was an emergency measure instituted in 1995 after discovery of cracking in the disk web area, an area not then covered by ultrasonic and eddy current inspections. These inspection methods were subsequently developed and incorporated into the inspection plan. Additionally, AD 95-18-14 did not prescribe inspection intervals, only inspection techniques, therefore, the benefit of AD 95- 18-14 was not considered in the risk analysis associated with the current AD's.
Additional Spool Part Numbers (P/N's) as a Result of Unrelated Repairs
One commenter expresses a concern that additional spool P/N's, which have been generated due to unrelated repairs on spools that are subject to the inspection requirements of this AD, are not being captured by the AD. The commenter feels that these P/N's should be added to the AD. The commenter raises this issue to ensure that spools with P/N's that were not included in the proposed rule are not excluded from this inspection program.
The FAA agrees. The new P/N's will be incorporated in this AD. However, their incorporation does not increase the originally affected spool population size.
New Revisions to the Applicable Service Bulletins
One commenter, the manufacturer, advises the FAA that the applicable service bulletins may be revised for nontechnical reasons. The commenter feels that the latest revisions of the service bulletins need to be incorporated into the AD.
The FAA agrees. The revision numbers and dates have been incorporated into this final rule.
Request To Change Paragraph (j)(2)
One commenter requests that paragraph (j)(2) be changed to ensure that the hub and web receive an initial inspection if either of the two areas were not previously inspected. The same commenter suggests that paragraph (j)(2) be split into two paragraphs to properly specify the inspection deadlines for the hub and for the web, now that the originally proposed deadlines have been changed to accommodate the economic and operational burden associated with the web inspection.
The FAA agrees. We have changed paragraph (j)(2) of this AD. Because of the new schedule requirements, two paragraphs, each with its own schedule, are appropriate and the change has been made.
Request To Clarify ``Replace Before Further Flight'' Requirement on CF6-50 Spools
One commenter observes that the ``replace before further flight'' requirements for the CF6-50 spools include the reject limits of service bulletin CF6-50 S/B 72-A1131, while the preceding paragraph does not include this service bulletin. The commenter raised this comment out of concern that the inspection requirement per service bulletin CF6-50 S/B 72-A1131 was not identified in the preceding step.
The FAA partially agrees. In the current text, an inference may be made that spools must be inspected to all three referenced bulletins at each repeat inspection. The spool disposition requirements apply to results of all prescribed inspections specified in all the steps of the pertinent paragraph in the AD and not just to the preceding step. Therefore, for further clarification a heading ``Spool Disposition'' has been inserted.
Request To Add a Heading of ``Spool Reinstallation Limit''
One commenter requests that the heading Spool Reinstallation Limit be added before the applicable paragraphs. The commenter feels that the addition will clarify the intent of the paragraphs.
The FAA agrees. We have added the heading to the applicable paragraphs.
Concern Over the Availability of Training and Equipment
One commenter expresses concern that the requirements of ASB CF6- 80C2 72-A0934, Revision 3, can not be done because the equipment and training necessary to carry out this inspection are not available at this time. The commenter makes this comment out of concern that the prescribed inspections could not be done, per the proposed rule timetables, since there was no scheduled delivery of the necessary equipment and associated training.
The FAA agrees. However, this issue has been addressed by the engine manufacturer. Both equipment and training will be available in time to enable the commenter to comply with the requirements of this AD, therefore, no changes have been made.
Request To Change the Definition of a Shop Visit
One commenter states that the introduction of an engine into the shop solely for the 3-9 spool inspection should not be considered a shop visit. The request is made so that the stage 3-5 dovetail slot bottom inspection for the CF6-80C2 13-inch billet spools would not be forced if the spools could otherwise comply using the module level inspection. The hub and web inspections can be done at module level merely by removing the fan module from the core. The slot bottom inspection requires additional disassembly to remove the compressor top case. The request is made to avoid this additional disassembly.
The FAA disagrees. Material testing and stress analysis indicate that the dovetail slot bottoms have a dwell-fatigue limitation. Accordingly, the rule requires initial slot bottom inspection at the earliest exposure (piece-part exposure or rotor exposure, which is realized upon top case removal) but not later than the next required inspection of the hub and/or web for dwell fatigue
[[Page 77656]]
cracking. As the cracking mode is the same for all areas, the FAA can not apply lesser criteria to the slot bottoms.
Request To Include the 3-5 Dovetail Slot Bottom Inspection at Piece- Part Level Only
One commenter requests that the repeat inspection of the CF6-80C 13-inch billet spool stage 3-5 dovetail slot bottoms be required at piece-part exposure only. Accomplishment of this inspection at a module level would require, at a minimum, the removal of the compressor top case.
The FAA disagrees for reasons stated in the answer to the previous comment.
Request To Clarify the Reference Date for the Initial Inspection
One commenter states that there is no reference date for the initial inspection required in paragraph (a)(3) from which the operator is to determine items (i), (ii), and (iii) under this paragraph. The commenter uses the example that item (i) requires an inspection at the first piece-part exposure (PPE) after 1,000 CSN. The spool may have had several PPE's after 1,000 CSN in its life but never had the requirement to inspect at those visits. The commenter requests clarification of the reference date in this paragraph to ensure the proper time set.
The FAA disagrees. The proposal does not contain new requirements. It consolidates requirements of existing airworthiness directives, which include paragraph (a)(3). In the past, if an opportunity to have a PPE arose as the commenter states, the requirement of AD 99-24-15 would have been applicable. Additionally, the cyclic requirements of steps (i) and (ii) are associated with the cyclic life of the spool and not an independent cyclic interval. The third step (iii) also does not need the association with the effective date of this AD. Incorporation of the change the commenter proposes would conflict with requirements of the existing AD relative to the dovetail inspection. The proposed change would also affect additional paragraphs of the rule, not identified by the commenter, where similar arguments can be made.
Potential Confusion Over Requirements for Piece-Part Inspections
One commenter, the manufacturer, informs the FAA that a potential for confusion exists regarding the requirements for the one-time hub inspection of 8-inch billet spools. The existing wording in certain ASB's could be interpreted such that a modular level inspection of the hub could be performed, when in fact, piece-part inspection using Procedure A is required to achieve the intended level of safety. The manufacturer has revised the appropriate ASB's to add this clarification and suggests additional wording be added to this rule to ensure the correct procedure is used.
The FAA agrees. We have clarified the hub inspection requirements for affected spools in paragraphs (d)(1), (h)(1), (k)(1), and (m)(1).
Request To Correct P/N's and SN's for CF6-50 16-Inch and 13-Inch Billets
The same commenter states that the part number and serial number relationships for the CF6-50 16-inch and 13-inch billet spools relative to Table 2 were incorrect in the information that it sent to the FAA and need to be corrected in paragraphs (a) and (b), respectively.
The FAA agrees. We have made the appropriate changes to the final rule.
After careful review of the available data, including the comments noted above, the FAA has determined that air safety and the public interest require the adoption of the rule with the changes described previously. The FAA has determined that these changes will neither increase the economic burden on any operator nor increase the scope of the AD.
Cost Analysis
There are approximately 3,147 engines of the affected design in the worldwide fleet. The FAA estimates that 1,289 engines installed on airplanes of U.S. registry would be affected by this proposed AD. The FAA also estimates that it would take approximately 238 work hours per engine to perform the proposed actions. The average labor rate is $60 per work hour. Required parts would cost approximately $35,000 per engine. In addition, because of the previous AD actions, the FAA estimates that only 72 percent (928 engines) of the engines installed on airplanes of U.S. registry would be affected. Based on these figures, the total cost of the proposed AD on U.S. operators is estimated to be $45,731,840.
Regulatory Analysis
This final rule does not have federalism implications, as defined in Executive Order 13132, because it would not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. Accordingly, the FAA has not consulted with state authorities prior to publication of this final rule.
For the reasons discussed above, I certify that this action (1) is not a ``significant regulatory action'' under Executive Order 12866; (2) is not a ``significant rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and (3) will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. A final evaluation has been prepared for this action and it is contained in the Rules Docket. A copy of it may be obtained by contacting the Rules Docket at the location provided under the caption ADDRESSES.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
Adoption of the Amendment
Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows:
PART 39--AIRWORTHINESS DIRECTIVES
-
The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
-
Section 39.13 is amended by removing Amendments 39-9361 (60 FR 46216, September 6, 1995), 39-11440 (64 FR 66554, November 29, 1999), and 39-11868 (65 FR 50623, August 21, 2000), and by adding a new airworthiness directive, Amendment 39-12984, to read as follows:
2002-25-08 General Electric Company (GE): Docket No. 2001-NE-26-AD. Supersedes AD 95-18-14, Amendment 39-9361; AD 99-24-15, Amendment 39-11440; and AD 2000-16-12, Amendment 39-11868.
Applicability:This airworthiness directive (AD) is applicable to GE CF6-45, -50, -80A, -80C2, and -80E1 turbofan engines with high pressure compressor rotor (HPCR) stage 3-9 spools with part numbers (P/N's) listed in the following Table 1 installed:
[[Page 77657]]
Table 1
Engine model
HPCR stage 3-9 spool P/N
CF6-45/50 Series Engines............... 9136M89G02, 9136M89G03, 9136M89G06, 9136M89G07, 9136M89G08, 9136M89G09, 9136M89G17, 9136M89G18, 9136M89G19, 9136M89G21, 9136M89G22, 9136M89G27, 9136M89G29, 9253M85G01, 9253M85G02, 9273M14G01, 9331M29G01. CF6-80A Series Engines................. 9136M89G10, 9136M89G11, 9136M89G20, 9136M89G21, 9136M89G22, 9136M89G27, 9136M89G28 CF6-80C2 Series Engines................ 1333M66G01, 1333M66G03, 1333M66G07, 1333M66G09, 1333M66G10, 1781M52P01, 1781M52P02, 1781M53G01, 1781M53G02 1781M53G03, 1781M53G04, 1781M53G05, 1781M53G06, 1781M53G07, 1781M53G08, 1781M53G09, 1781M53G10, 1854M95P01, 1854M95P02, 1854M95P03, 1854M95P04, 1854M95P05, 1854M95P06, 1854M95P07, 1854M95P08, 9380M28P05. CF6-80E1 Series Engines................ 1669M22G01, 1669M22G03, 1782M22G01, 1782M22G02, 1782M22G04.
These engines are installed on, but not limited to, Airbus A300, A310, and A330 series, Boeing 747 and 767 series, and McDonnell Douglas DC-10 and MD-11 series airplanes.
Note 1: This AD applies to each engine identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For engines that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (p) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
Compliance: Compliance with this AD is required as indicated, unless already done.
To detect cracks, which can cause separation of the HPCR stage 3-9 spool and possible uncontained engine failure, do the following:
CF6-45 and -50 16-Inch Billet Spools
(a) For CF6 HPCR stage 3-9 spool, part numbers (P/N's) 9136M89G02 and 9136M89G06; and for P/N's 9136M89G08, 9253M85G02, 9273M14G01, 9331M29G01 with serial numbers (SN's) listed in the following Table 2, do the following:
Table 2
MPOE3486
MPOE3487
MPOE3488
MPOE3489
MPOE3490
MPOE3491
MPOE3492 MPOG3832
MPOG3833
MPOG3834
MPOG3835
MPOG3836
MPOG3837
MPOG3838 MPOG3839
MPOG3840
MPOG3841
MPOG3842
MPOG3843
MPOG3844
MPOG3845 MPOG3846
MPOG3847
MPOG3848
MPOG3850
MPOG3851
MPOG5228
MPOG5230 MPOG5231
MPOG5232
MPOG6216
MPOG6727
MPOG6728
MPOG6729
MPOG6730 MPOG6731
MPOG6732
MPOG6733
MPOG6735
MPOG6736
MPOG6738
MPOG6739 MPOG6740
MPOG6741
MPOG6742
MPOG6743
MPOG6744
MPOG6745
MPOG6746 MPOG7713
MPOG7714
MPOG7715
MPOG7716
MPOG7717
MPOG7718
MPOG7719 MPOG7720
MPOG7721
MPOG7722
MPOG7723
MPOG7724
MPOG7725
MPOG7726 MPOG7727
MPOG7728
MPOG7729
MPOG7730
MPOG7731
MPOG7732
MPOG7733 MPOG7734
MPOG7735
MPOG7736
MPOG7737
MPOG7738
MPOG7739
MPOG7740 MPOG7741
MPOG7742
MPOG7743
MPOG7744
MPOG7819
MPOG7820
MPOG7821 MPOG7822
MPOG7823
MPOG7824
MPOG7825
MPOG7826
MPOG7827
MPOG7828 MPOG7829
MPOG7830
MPOG7831
MPOG7832
MPOG7833
MPOG7834
MPOG7835 MPOG7836
MPOG7837
MPOG7838
MPOG7839
MPOG8822
MPOG8823
MPOG8824 MPOG8825
MPOG8826
MPOG8827
MPOG8828
MPOG8829
MPOG8830
MPOG8831 MPOG8832
MPOG8833
MPOG8834
MPOG8835
MPOG8836
MPOG8837
MPOG9185 MPOG9186
MPOH0289
MPOH0290
MPOH0291
MPOH0292
MPOH0293
MPOH0294 MPOH0295
MPOH0296
MPOH0297
MPOH0298
MPOH0299
MPOH0300
MPOH0301 MPOH0302
MPOH0303
MPOH0304
MPOH0305
MPOH1805
MPOH2040
MPOH2041 MPOH2042
MPOH2043
MPOH2044
MPOH2045
MPOH2046
MPOH2047
MPOH2048 MPOH2049
MPOH2050
MPOH2051
MPOH2052
MPOH2053
MPOH2054
MPOH2055 MPOH2056
MPOH2057
MPOH2058
MPOH2059
MPOH2060
MPOH2061
MPOH2062 MPOH2829
MPOH2830
MPOH2831
MPOH2832
MPOH2833
MPOH2834
MPOH2835 MPOH2836
MPOH2837
MPOH2838
MPOH2839
MPOH2840
MPOH2841
MPOH2842 MPOH2843
MPOH2844
MPOH2845
MPOH2846
MPOH2847
MPOH2848
MPOH2849 MPOH2850
MPOH2851
MPOH2852
MPOH2853
MPOH2854
MPOH2855
MPOH2856 MPOH2857
MPOH2858
MPOH4307
MPOH4308
MPOH4309
MPOH4310
MPOH4311 MPOH4312
MPOH4313
MPOH5277
MPOH5278
MPOH5279
MPOH5280
MPOH5281 MPOH5282
MPOH5283
MPOH5520
MPOH5530
MPOH5531
MPOH5532
MPOH5533 MPOH5534
MPOH5535
MPOH5536
MPOH5537
MPOH5538
MPOH5539
MPOH5540 MPOH5541
MPOH5542
MPOH5543
MPOH5544
MPOH5545
MPOH5546
MPOH5547 MPOH5548
MPOH5549
MPOH5550
MPOH5551
MPOH5552
MPOH5553
MPOH5554 MPOH7020
MPOH7021
MPOH7022
MPOH7023
MPOH7024
MPOH7025
MPOH7026 MPOH7027
MPOH7028
MPOH7030
MPOH7960
MPOH7965
MPOH7966
MPOH7967 MPOH7968
MPOH7969
MPOH7970
MPOH7971
MPOH7972
MPOH7973
MPOH7974 MPOH7975
MPOH8638
MPOH8639
MPOH8640
MPOH8641
MPOH8642
MPOH8643 MPOH8644
MPOH8645
MPOH8646
MPOH8647
MPOH8648
MPOH8649
MPOH8650 MPOH8651
MPOH8652
MPOH8653
MPOH8654
MPOH8655
MPOH8656
MPOH8657 MPOH8658
MPOH8659
MPOH8677
MPOH8678
MPOH8679
MPOH8680
MPOH8682 MPOH8683
MPOH8684
MPOJ1796
MPOJ1797
MPOJ1798
MPOJ1799
MPOJ1800
[[Page 77658]]
MPOJ1801
MPOJ1803
MPOJ1804
MPOJ1806
MPOJ1930
MPOJ1931
MPOJ1932 MPOJ1933
MPOJ1934
MPOJ1935
MPOJ1936
MPOJ1938
MPOJ1939
MPOJ1940 MPOJ1941
MPOJ1942
MPOJ1943
MPOJ1944
MPOJ1945
MPOJ1946
MPOJ1947 MPOJ1948
MPOJ1949
MPOJ1950
MPOJ1951
MPOJ1953
MPOJ1954
MPOJ1955 MPOJ1956
MPOJ1957
MPOJ1958
MPOJ2420
MPOJ2421
MPOJ2422
MPOJ2423 MPOJ2424
MPOJ2425
MPOJ2426
MPOJ2427
MPOJ2428
MPOJ2429
MPOJ2430 MPOJ2431
MPOJ2432
MPOJ2433
MPOJ2434
MPOJ2435
MPOJ2436
MPOJ2437 MPOJ2438
MPOJ2439
MPOJ2440
MPOJ2441
MPOJ2442
MPOJ2443
MPOJ2444 MPOJ2445
MPOJ2446
MPOJ2447
MPOJ2448
MPOJ2449
MPOJ2450
MPOJ4173 MPOJ4174
MPOJ5185
MPOJ5186
MPOJ6035
MPOJ6036
MPOJ6039
MPOJ6040 MPOJ6041
MPOJ6042
MPOJ6043
MPOJ6044
MPOJ6045
MPOJ6046
MPOJ6047 MPOJ6048
MPOJ6049
MPOJ6050
MPOJ6051
MPOJ6052
MPOJ6053
MPOJ6054 MPOJ6055
MPOJ6056
MPOJ6057
MPOJ6058
MPOJ6059
MPOJ6060
MPOJ6061 MPOJ6062
MPOJ6063
MPOJ6064
MPOJ6065
MPOJ6066
MPOJ6067
MPOJ6068 MPOJ6500
MPOJ6501
MPOJ6502
MPOJ6503
MPOJ6505
MPOJ6506
MPOJ6507 MPOJ6508
MPOJ6509
MPOJ6510
MPOJ6511
MPOJ6512
MPOJ6513
MPOJ6514 MPOJ6515
MPOJ6516
MPOJ6517
MPOJ7632
MPOJ7633
MPOJ7634
MPOJ7635 MPOJ7636
MPOJ7637
MPOJ7638
MPOJ7639
MPOJ7640
MPOJ7641
MPOJ7642 MPOJ7643
MPOJ8046
MPOJ8047
MPOJ8048
MPOJ8049
MPOJ8050
MPOJ8051 MPOJ9308
MPOJ9309
MPOJ9310
MPOJ9311
MPOJ9312
MPOJ9313
MPOJ9314 MPOJ9315
MPOK1233
MPOK1234
MPOK1235
MPOK1236
MPOK1237
MPOK1238 MPOK1239
MPOK1240
MPOK1824
MPOK1825
MPOK1826
MPOK1827
MPOK1828 MPOK1829
MPOK1830
MPOK1831
MPOK1832
MPOK2694
MPOK2695
MPOK3067 MPOK3068
MPOK3069
MPOK3070
MPOK3071
MPOK4659
MPOK4660
MPOK4661 MPOK4662
MPOK4663
MPOK4664
MPOK4665
MPOK4666
MPOK4667
MPOK5082 MPOK5083
MPOK5084
MPOK5085
MPOK5086
MPOK5087
MPOK5088
MPOK5520 MPOK5521
MPOK5522
MPOK5955
MPOK5956
MPOK5957
MPOK5958
MPOK5959 MPOK5960
MPOK5961
MPOK5962
MPOK5963
MPOK5964
MPOK6247
MPOK6248 MPOK6249
MPOK6250
MPOK6251
MPOK6252
MPOK6253
MPOK6254
MPOK6255 MPOK6256
MPOK6257
MPOK6715
MPOK6716
MPOK6823
MPOK6824
MPOK6825 MPOK6826
MPOK6827
MPOK6828
MPOK6829
MPOK6830
MPOK6831
MPOK7226 MPOK7227
MPOK7228
MPOK7229
MPOK7230
MPOK7231
MPOK7232
MPOK7233 MPOK7234
MPOM2128
MPOM2129
MPOM2130
MPOM2131
MPOM2132
MPOM2133 MPOM2134
MPOM2135
MPOM2136
MPOM2137
MPOM2138
MPOM2357
MPOM2358 MPOM2359
MPOM2360
MPOM2361
MPOM2362
MPOM2363
MPOM2364
MPOM2365 MPOM2366
MPOM2461
MPOM2462
MPOM5521
MPOM5522
MPOM5523
MPOM5524 MPOM5525
MPOM5526
MPOM5527
MPOM5528
MPOM5529
MPOM5530
MPOM5531 MPOM5532
MPOM5533
MPOM5534
MPOM5535
MPOM5536
MPOM5537
MPOM6151 MPOM6152
MPOM6153
MPOM6154
MPOM6155
MPOM6156
MPOM6157
MPOM6158 MPOM6159
MPOM6160
MPOM6161
MPOM6162
MPOM7087
MPOM7088
MPOM7089 MPOM7091
MPOM7092
MPOM7093
MPOM7094
MPOM7095
MPOM7096
MPOM7097 MPOM7098
MPOM7099
MPOM7100
MPOM7101
MPOM7102
MPOM7103
MPOM7104 MPOM7105
MPOM7106
MPOM7107
MPOM7108
MPOM7109
MPOM8297
MPOM8298 MPOM8299
MPOM8300
MPOM8301
MPOM8302
MPOM9246
MPOM9257
MPOM9258 MPOM9259
MPOM9260
MPOM9261
MPOM9262
MPOM9265
MPOM9721
MPOM9722 MPOM9723
MPON0051
MPON0052
MPON0053
MPON0055
MPON0056
MPON0057 MPON0058
MPON0059
MPON0060
MPON0061
MPON0062
MPON0063
MPON0064 MPON0065
MPON0066
MPON0067
MPON0068
MPON0069
MPON0073
MPON0074 MPON0075
MPON0076
MPON1077
MPON1078
MPON1079
MPON1080
MPON1081 MPON1082
MPON1084
MPON1085
MPON1086
MPON1087
MPON1088
MPON1089 MPON1090
MPON1091
MPON1092
MPON1093
MPON1094
MPON1095
MPON1096 MPON1097
MPON1098
MPON1099
MPON1100
MPON1642
MPON4250
MPON4252 MPON4254
MPON4255
MPON4256
Initial Inspection
(1) If the spool has not already been inspected using one of the alert service bulletins (ASB's) or service bulletins (SB's) listed in Column A of the following Table 3; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect hub and bore in accordance with alert service bulletin
(ASB) CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002, and the following compliance times:
Table 3
CF6-45 and -50 SB No.
Procedures (70-32-XX) in Standard Practices Manual GEK9250
Column A
Column B
Column C
Column D
Column E
SB 72-888, Revision 3, dated 70-32-09, Revision 70-32-10, 71, 70-32-13,
70-32-14, TR 70- January 31, 1991.
71, dated October Revision dated Temporary
26, dated August 1, 1995.
October 1, 1995. Revision (TR), 70- 26, 1996. 25, dated August 26, 1996. SB 72-888, Revision 4, dated 70-32-09, Revision 70-32-10, Revision 70-32-13, Revision 70-32-14, Revision March 28, 1991.
72, dated
72, dated
72, dated
72, dated November 15, 1996. November 15, 1996. November 15, 1996. November 15, 1996.
[[Page 77659]]
SB 72-888, Revision 5, dated 70-32-09, Revision 70-32-10, Revision 70-32-13, Revision 70-32-14, Revision November 7, 1994.
74, dated May 1, 74, dated May 1, 73, dated
73, dated 1998.
-
November 1, 1997. November 1, 1997. SB 72-888, Revision 6, dated .................. 70-32-10, Revision 70-32-13, Revision 70-32-14, Revision December 22, 1995.
75, dated
75, dated
75, dated December 15, 1998. December 15, 1998. December 15, 1998. SB 72-1000, Original dated
.................. .................. 70-32-13, TR 70- 70-32-14, TR 70- December 14, 1990.
41, dated
42, dated February 10, 1999. February 10, 1999. SB 72-1000, Revision 1, dated .................. .................. 70-32-13, Revision 70-32-14, Revision March 28, 1991.
76, dated May 15, 76, dated May 15, 1999.
-
SB 72-1000, Revision 2, dated .................. .................. 70-32-17, TR 70- 70-32-18, TR 70- September 9, 1993.
39, dated
40, dated December 15, 1998. December 15, 1998. SB 72-1000, Revision 3, dated .................. .................. 70-32-17, Revision 70-32-18, Revision December 22, 1995.
76, dated May 15, 76, dated May 15, 1999.
-
SB 72-1108, Original, dated .................. .................. 70-32-17, TR 70- 70-32-18, TR 70- November 6, 1995.
47, dated October 48, dated October 28, 1999.
28, 1999. SB 72-1108, Revision 1, dated
.................. July 29, 1996. ASB 72-A1108, Revision 2, dated
.................. October 28, 1999. ASB 72-A1108, Revision 3, dated
.................. November 12, 1999. ASB 72-A1108, Revision 4, dated
.................. June 6, 2001. ASB CF6-50 S/B 72-A1108,
.................. Revision 5, dated October 2, 2002.
(i) For spools with greater than 3,500 cycles-since-new (CSN) on the effective date of this AD, inspect before further flight.
(ii) For spools with 3,500 or fewer CSN, on the effective date of this AD, inspect at the first piece-part exposure (PPE) after 1,000 CSN or before 3,500 CSN, whichever occurs earlier.
(2) For spools that have not been inspected using ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, or an earlier revision of ASB CF6-50 S/B 72-A1131 or SB 72-1131, inspect the web and hub- to-web transition areas in accordance with the requirements of ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, at the first PPE after 1,000 CSN, but before 4,000 additional cycles in-service (CIS) after the effective date of this AD.
(3) For spools that have not been inspected using ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, or an earlier revision of ASB CF6-50 S/B 72-A1157, inspect the stage 3-5 dovetail slot bottoms in accordance with the requirements of ASB CF6-50 S/B 72- A1157, Revision 4, dated October 2, 2002, at the earliest of:
(i) The first PPE after 1000 CSN, or
(ii) The first HPC rotor exposure after 1000 CSN, or
(iii) The next required inspection to ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002.
Repetitive Inspection
(4) For spools that have already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, reinspect the hub and bore in accordance with the requirements of ASB CF6-50 S/B 72- A1108, Revision 5, dated October 2, 2002, and the stage 3-5 dovetail slot bottoms in accordance with ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, at the earliest of:
(i) Each PPE with more than 1,000 cycles-since-last-inspection (CSLI) and 3,500 CSN, or
(ii) From July 29, 2001 through January 27, 2003, before the cycle limits of the following Table 4:
Table 4
CSN at last inspection
Repeat inspection by
(A) 6,000 or fewer CSN................. 3,500 CSLI. (B) 6,001 to 7,000 CSN................. 9,500 CSN. (C) 7,001 to 8,000 CSN................. 2,500 CSLI. (D) 8,001 to 8,500 CSN................. 10,500 CSN. (E) 8,501 or more CSN.................. 2,000 CSLI.
(iii) After January 27, 2003, before the cycle limits of the following Table 5:
Table 5.
CSN at last inspection
Repeat inspection by
(A) 5,000 or fewer CSN................. 3,500 CSLI. (B) 5,001 to 5,500 CSN................. 8,500 CSN. (C) 5,501 to 6,500 CSN................. 3,000 CSLI. (D) 6,501 to 7,000 CSN................. 9,500 CSN. (E) 7,001 to 8,000 CSN................. 2,500 CSLI. (F) 8,001 to 8,500 CSN................. 10,500 CSN. (G) 8,501 or more CSN.................. 2,000 CSLI.
Spool Disposition
(5) If inspection findings equal or exceed the reject limits established by ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002; or ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002; or ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, replace spool before further flight.
CF6-45 and -50 13-inch Billet Spools
(b) For CF6 HPC Rotor Stage 3-9 Spool, P/N's 9136M89G03, 9136M89G07, 9136M89G09, 9136M89G17, 9136M89G18, 9253M85G01, and for P/N's 9136M89G08, 9253M85G01, 9273M14G01, and 9331M29G01 with serial numbers that are not listed in Table 2, do the following:
Initial Inspection
(1) If the spool has greater than 7,000 CSN on the effective date of this AD and has not
[[Page 77660]]
already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect hub and bore in accordance with ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002 before further flight.
(2) If the spool has 7,000 or fewer CSN on the effective date of this AD and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect hub and bore in accordance with ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002, at the earliest of:
(i) The first PPE after 1,000 CSN, or
(ii) The first engine shop visit (ESV) after 4,000 CSN, or
(iii) From July 29, 2001, through January 27, 2003, before 7,000 CSN, and after January 27, 2003, before 4,000 CSN.
(3) For spools that have not been inspected using ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, or an earlier revision of ASB CF6-50 S/B 72-A1131 or SB 72-1131, inspect the web and hub- to-web transition areas in accordance with the requirements of ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) Within 4,000 additional CIS after the effective date of this AD.
(4) For spools that have not been inspected using ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, or an earlier revision of ASB CF6-50 S/B 72-A1157, inspect the stage 3-5 dovetail slot bottoms in accordance with the requirements of ASB CF6-50 S/B 72- A1157, Revision 4, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) Within 4,000 additional CIS after the effective date of this AD.
Repetitive Inspection
(5) For spools that have already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, reinspect the hub and bore in accordance with the requirements of ASB CF6-50 S/B 72- A1108, Revision 5, dated October 2, 2002, at the earliest of:
(i) Each PPE with more than 1,000 CSLI and 4,000 CSN, or
(ii) Each ESV with more than 2,000 CSLI and 4,000 CSN, or
(iii) Before 4,000 CSLI.
Spool Disposition
(6) If inspection findings equal or exceed the reject limits established by ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002; or ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002; or ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, replace spool before further flight.
CF6-45 and -50 9 and 10-Inch Billet Spools
(c) For CF6 HPCR stage 3-9 spool, P/N's 9136M89G19, 9136M89G21, 9136M89G22 and 9136M89G27, do the following:
Initial Inspection
(1) If the spool has greater than 7,000 CSN on the effective date of this AD and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect the hub and bore in accordance with ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002 before further flight.
(2) If the spool has 7,000 or fewer CSN on the effective date of this AD, and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect the hub and bore in accordance with ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002, at the earliest of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 3,000 CSN, or
(iii) From July 29, 2001 through January 27, 2003, before 7,000 CSN, and after January 27, 2003, before 3,500 CSN.
(3) For spools that have not been inspected using ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, or an earlier revision of ASB CF6-50 S/B 72-A1131 or SB CF6-50 S/B 72-1131, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) Within 4,000 additional CIS after the effective date of this AD.
(4) For spools that have not been inspected using ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, or an earlier revision of ASB CF6-50 S/B 72-A1157, inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB CF6-50 S/B 72- A1157, Revision 4, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) Within 4,000 additional CIS after the effective date of this AD.
Repetitive Inspection
(5) For spools that have already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, reinspect the hub and bore in accordance with the requirements of ASB CF6-50 S/B 72- A1108, Revision 5, dated October 2, 2002, at the earliest of:
(i) Each PPE with more than 1,000 CSLI and 3,500 CSN, or
(ii) From July 29, 2001, through January 27, 2003, before the cycle limits of the following Table 6, or:
Table 6
CSN at last inspection
Reinspect by
(A) 3,500 or fewer CSN................. 7,000 CSN. (B) 3,501 to 6,000 CSN................. 3,500 CSLI. (C) 6,001 to 7,000 CSN................. 9,500 CSN. (D) 7,001 to 8,000 CSN................. 2,500 CSLI. (E) 8,001 to 8,500 CSN................. 10,500 CSN. (F) 8,501 or more CSN.................. 2,000 CSLI.
(iii) After January 27, 2003, before the cycle limits of Table 5.
Spool Disposition
(6) If inspection findings equal or exceed the reject limits established by ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002; or ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002; or ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002; replace spool before further flight.
Spool Reinstallation Limit
(7) After the effective date of this AD, do not install any engine that has an HPCR stage 3-9 spool, P/N's 9136M89G19, 9136M89G21, 9136M89G22, and 9136M89G27, installed where the spool has 10,500 or more CSN.
CF6-45 and -50 8-Inch Billet 2-Piece spools
(d) For CF6 HPCR stage 3-9 spool, P/N 9136M89G29, do the following:
(1) If the spool has not already been inspected using one of the ASB's or SB's listed in Column A of Table 3; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect hub and bore in accordance with the piece-part level inspection of ASB CF6- 50 S/B 72-A1108, Revision 5, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
(2) For spools that have not been inspected using ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, or an earlier revision of ASB CF6-50 S/B 72-A1131 or SB 72-1131, inspect the web and hub- to-web transition areas in accordance with the requirements of ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
(3) For spools that have not been inspected using ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, or an earlier revision of ASB 72-A1157, inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB CF6-50 S/B 72-A1157, Revision 4, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
Spool Disposition
(4) If inspection findings equal or exceed the reject limits established by ASB CF6-50 S/B 72-A1108, Revision 5, dated October 2, 2002; or ASB CF6-50 S/B 72-A1131, Revision 4, dated October 2, 2002; or ASB CF6-50 S/B 72-A1157, Revision 4, dated
[[Page 77661]]
October 2, 2002; replace spool before further flight.
CF6-80A 16-Inch Billet Spools
(e) For CF6 HPCR stage 3-9 spool, P/N's 9136M89G10 with SN's MPOM0054, MPOM7090, MPOM8303, MPOM8304, MPOM9263, MPOM9264, MPON0054, MPON0071, MPON0072, MPON1643, MPON4251, or MPON4253, do the following:
Initial Inspection
(1) If the spool has not already been inspected using one of the ASB's or SB's listed in Column A of the following Table 7; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect hub and bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002, and the following compliance times:
Table 7
CF6-80A SB No.
Procedures (70-32-XX) in standard practices manual GEK9250
Column A
Column B
Column C
Column D
Column E
SB 72-500, Revision 3, dated 70-32-09, Revision 70-32-10, Revision 70-32-13,
70-32-14, TR 70- March 19, 1991.
71, dated October 71, dated October Temporary
26, dated August 1, 1995.
1, 1995.
Revision (TR), 70- 26, 1996. 25, dated August 26, 1996. SB 72-500, Revision 4, dated 70-32-09, Revision 70-32-10, Revision 70-32-13, Revision 70-32-14, Revision July 1, 1991.
72, dated
72, dated
72, dated
72, dated November 15, 1996. November 15, 1996. November 15, 1996. November 15, 1996. SB 72-500, Revision 5, dated 70-32-09, Revision 70-32-10, Revision 70-32-13, Revision 70-32-14, Revision November 7, 1994.
74, dated May 1, 74, dated May 1, 73, dated
73, dated 1998.
-
November 1, 1997. November 1, 1997. SB 72-500, Revision 6, dated .................. 70-32-10, Revision 70-32-13, Revision 70-32-14, Revision December 22, 1995.
75, dated
75, dated
75, dated December 15, 1998. December 15, 1998. December 15, 1998. SB 72-583, Original, dated
.................. .................. 70-32-13, TR 70- 70-32-14, TR 70- December 20, 1990.
41, dated
42, dated February 10, 1999. February 10, 1999. SB 72-583, Revision 1, dated .................. .................. 70-32-13, Revision 70-32-14, Revision March 18, 1991.
76, dated May 15, 76, dated May 15, 1999.
-
SB 72-583, Revision 2, dated .................. .................. 70-32-17, TR 70- 70-32-18, TR 70- July 15, 1991.
39, dated
40, dated December 15, 1998. December 15, 1998. SB 72-583, Revision 3, dated .................. .................. 70-32-17, Revision 70-32-18, Revision July 24, 1991.
76, dated May 15, 76, dated May 15, 1999.
-
SB 72-583, Revision 4, dated .................. .................. 70-32-17, TR 70- 70-32-18, TR 70- September 15, 1993.
47, dated October 48, dated October 28, 1999.
28, 1999. SB 72-583, Revision 5, dated December 22, 1995. SB 72-678, Original, dated November 6, 1995. SB 72-678, Revision 1, dated July 29, 1996. ASB 72-A678, Revision 2, dated October 28, 1999. ASB 72-A678, Revision 3, dated November 12, 1999. ASB 72-A0678, Revision 4, dated June 6, 2001. ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002.
(i) For spools with greater than 3,500 CSN on the effective date of this AD, inspect before further flight.
(ii) For spools with 3,500 or fewer CSN on the effective date of this AD, inspect at the first PPE after 1,000 CSN or before 3,500 CSN, whichever occurs earlier.
(2) For spools that have not been inspected using ASB CF6-80A S/ B 72-A0691, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0691 or SB 72-0691, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) Within 4,000 additional CIS accumulated after the effective date of this AD.
(3) For spools that have not been inspected using ASB CF6-80A S/ B 72-A0719, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0719, inspect the stage 3--5 dovetail slot bottom in accordance with the requirements of ASB CF6- 80A S/B 72-A0719, Revision 5, dated October 2, 2002, at the earliest of:
(i) The first PPE after 1,000 CSN, or
(ii) The first HPCR exposure after 1,000 CSN, or
(iii) The next required inspection to ASB
CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002.
Repetitive Inspections
(4) For spools that have already been inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D and one from Column E, reinspect the hub and bore in accordance with the requirements of ASB CF6-80A S/B 72- A0678, Revision 5, dated October 2, 2002; and the dovetail slot bottoms in accordance with the requirements of ASB CF6-80A S/B 72- A0719, Revision 5, dated October 2, 2002, at the earliest of:
(i) Each PPE with more than 1,000 CSLI and 3,500 CSN, or
[[Page 77662]]
(ii) From July 29, 2001 through January 27, 2003 before the cycle limits of Table 4, or
(iii) After January 27, 2003, before the cycle limits of Table 5.
Spool Disposition
(5) If inspection findings equal or exceed the reject limits established by ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002; replace spool before further flight.
Spool Reinstallation Limit
(6) After the effective date of this AD, do not install any engine that has an HPCR stage 3-9 spool P/N 9136M89G10 with serial numbers (SN's) MPOM0054, MPOM7090, MPOM8303, MPOM8304, MPOM9263, MPOM9264, MPON0054, MPON0071, MPON0072, MPON1643, MPON4251, or MPON4253, installed where the spool has 10,500 or more CSN.
CF6-80A 13-Inch Billet Spools
(f) For all other CF6 HPCR stage 3-9 spools,
P/N 9136M89G10, with SN's that are not listed in paragraph (e) of this AD, and P/N 9136M89G11, do the following:
Initial Inspection
(1) If the spool has greater than 7,000 CSN on the effective date of this AD and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect hub and bore in accordance with ASB CF6-80A 72-A0678, Revision 5, dated October 2, 2002 before further flight.
(2) If the spool has 7,000 or fewer CSN on the effective date of this AD and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect hub and bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002, at the earliest of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 5,000 CSN or
(iii) From July 29, 2001, through January 27, 2003 before 7,000 CSN, and after January 27, 2003, before 5,000 CSN.
(3) For spools that have not been inspected using ASB CF6-80A S/ B 72-A0691, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0691 or SB 72-0691, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) Within 4,000 additional CIS after the effective date of this AD.
(4) For spools that have not been inspected using ASB CF6-80A S/ B 72-A0719, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0719, inspect the dovetail slot bottom in accordance with the requirements of ASB CF6-80A S/B 72- A0719, Revision 5, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) Within 4,000 additional CIS after the effective date of this AD.
Repetitive Inspection
(5) For spools installed in CF6-80A1 and CF6-80A3 engines that were inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, reinspect hub and bore in accordance with alert ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002, at the earliest of:
(i) Each PPE with more than 1,000 CSLI and 5,000 CSN, or
(ii) Each ESV with more than 2,000 CSLI and 5,000 CSN, or
(iii) Within 4,000 CSLI and more than 5,000 CSN.
(6) Spools installed in CF6-80A and CF6-80A2 engines previously inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, reinspect hub and bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002, at the earliest of:
(i) Each PPE with more than 1,000 CSLI and 5,000 CSN, or
(ii) Each ESV with more than 1,500 CSLI and 5,000 CSN, or
(iii) Within 4,000 CSLI and more than 5,000 CSN.
Spool Disposition
(7) If inspection findings equal or exceed the reject limits established by ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002; replace spool before further flight.
CF6-80A 9 and 10-Inch Billet Spools
(g) For CF6 HPCR stage 3-9 spools, P/N's 9136M89G20, 9136M89G21, 9136M89G22 and 9136M89G27, do the following:
Initial Inspection
(1) If the spool has greater than 7,000 CSN on the effective date of this AD and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect hub and bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002 before further flight.
(2) If the spool has 7,000 or fewer CSN on the effective date of this AD and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, inspect hub and bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002, at the earliest of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 3,000 CSN or
(iii) From July 29, 2001, through January 27, 2003, before 7,000 CSN, and after January 27, 2003, before 5,000 CSN.
(3) For spools that have not been inspected using ASB CF6-80A S/ B 72-A0691, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0691, or SB 72-0691, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) Within 4,000 additional CIS after the effective date of this AD.
(4) For spools that have not been inspected using ASB CF6-80A S/ B 72-A0719, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0719 inspect the dovetail slot bottom in accordance with the requirements of ASB CF6-80A S/B 72- A0719, Revision 5, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) Within 4,000 additional CIS after the effective date of this AD.
Repetitive Inspection
(5) For spools that have already been inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, reinspect hub and bore in accordance with ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002, at the earliest of:
(i) Each PPE with more than 1,000 CSLI and 5,000 CSN, or
(ii) From July 29, 2001 through January 27, 2003, before the cycle limits of Table 6.
(iii) After January 27, 2003, before the cycle limits of the following Table 8:
Table 8
CSN at last inspection
Repeat inspection by
(A) 1,500 or fewer CSN................. 5,000 CSN (B) 1,501 to 5,000 CSN................. 3,500 CSLI (C) 5,001 to 5,500 CSN................. 8,500 CSN (D) 5,501 to 6,501 CSN................. 3,000 CSLI (E) 6,501 to 7,000 CSN................. 9,500 CSN (F) 7,001 to 8,000 CSN................. 2,500 CSLI (G) 8,001 to 8,500 CSN................. 10,500 CSN (H) 8,501 or more CSN.................. 2,000 CSLI
Spool Disposition
(6) If inspection findings equal or exceed the reject limits established by ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002; replace spool before further flight.
[[Page 77663]]
Spool Reinstallation Limit
(7) After the effective date of this AD, do not install any engine that has an HPCR stage 3-9 spool, P/N's 9136M89G20, 9136M89G21, 9136M89G22, and 9136M89G27, installed where the spool has 10,500 or more CSN.
CF6-80A 8-Inch Billet 2-Piece Spools
(h) For CF6 HPCR stage 3-9 spool, P/N 9136M89G28, do the following:
(1) If the spool has not already been inspected using one of the ASB's or SB's listed in Column A of Table 7; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect hub and bore in accordance with the piece-part level inspection of ASB CF6- 80A S/B 72-A0678, Revision 5, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
(2) For spools that have not been inspected using ASB CF6-80A S/ B 72-A0691, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0691, or SB 72-0691, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
(3) For spools that have not been inspected using ASB CF6-80A S/ B 72-A0719, Revision 5, dated October 2, 2002, or an earlier revision of ASB CF6-80A S/B 72-A0719 inspect the stage 3--5 dovetail slot bottom in accordance with the requirements of ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
Spool Disposition
(4) If inspection findings equal or exceed the reject limits established by ASB CF6-80A S/B 72-A0678, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0691, Revision 5, dated October 2, 2002; or ASB CF6-80A S/B 72-A0719, Revision 5, dated October 2, 2002; replace spool before further flight.
CF6-80C2 13-Inch Billet Spools
(i) For CF6 HPCR stage 3-9 spool, P/N's 1781M52P01, 1854M95P02,1781M52P02, 1854M95P05 and 9380M28P05, do the following:
Initial Inspection
(1) If the spool has not already been inspected using one of the ASB's or SB's listed in Column A of the following Table 9; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect hub and bore in accordance with ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002, and the following compliance times:
Table 9
CF6-80C2 SB No.
Procedures (70-32-XX) in standard practices manual GEK9250
Column A
Column B
Column C
Column D
Column E
SB 72-418, Revision 2, May 14, 70-32-09, Revision 70-32-10, Revision 70-32-13,
70-32-14, TR 70- 1991.
71, dated October 71, dated October Temporary
26, dated August 1, 1995.
1, 1995.
Revision (TR), 70- 26, 1996. 25, dated August 26, 1996. SB 72-418, Revision 3, November 70-32-09, Revision 70-32-10, Revision 70-32-13, Revision 70-32-14, Revision 7, 1994.
72, dated
72, dated
72, dated
72, dated November 15, 1996. November 15, 1996. November 15, 1996. November 15, 1996. SB 72-418, Revision 4, December 70-32-09, Revision 70-32-10, Revision 70-32-13, Revision 70-32-14, Revision 22, 1995.
74, dated May 1, 74, dated May 1, 73, dated
73, dated 1998.
-
November 1, 1997. November 1, 1997. SB 72-758, Original, dated
.................. 70-32-10, Revision 70-32-13, Revision 70-32-14, Revision November 7, 1994.
75, dated
75, dated
75, dated December 15, 1998. December 15, 1998. December 15, 1998. SB 72-758, Revision 1, dated .................. .................. 70-32-13, TR 70- 70-32-14, TR 70- December 22, 1995.
41, dated
42, dated February 10, 1999. February 10, 1999. SB 72-812, Original, dated
.................. .................. 70-32-13, Revision 70-32-14, Revision November 6, 1995.
76, dated May 15, 76, dated May 15, 1999.
-
SB 72-812, Revision 1, dated .................. .................. 70-32-17, TR70-39, 70-322-18, TR 70- january 30, 1998.
dated December 40, dated 15, 1998.
December 15, 1998. ASB 72-A0812, Revision 2, dated .................. .................. 70-32-17, Revision 70-32-18, Revision October 28, 1999.
76, dated May 15, 76, dated May 15, 1999.
-
ASB 72-A0812, Revision 3, dated .................. .................. 70-32-17, TR 70- 70-32-18, TR 70- June 6, 2001.
47, dated October 48, October 28, 28, 1999.
-
ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002..
(i) For spools with greater than 3,500 CSN on the effective date of this AD, inspect before further flight.
(ii) For spools with 3,500 or fewer CSN on the effective date of this AD, inspect at the first PPE after 1,000 CSN or before 3,500 CSN, whichever occurs earlier.
(2) For spools that have not been inspected using ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, or an earlier revision of ASB 72-A0848 or SB 72-0848, inspect the web and hub-to- web transition areas in accordance with the requirements of ASB CF6- 80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, at the earliest of:
(i) The first PPE after 1000 CSN, or
(ii) The next required inspection to ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002, or
(iii) From July 29, 2001 through January 27, 2003, before 7,000 CSN, and after January 27, 2003, before 3,500 CSN.
(3) For spools that have not been inspected using ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002, or an earlier revision of ASB 72-A0934, inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002, at the earliest of:
(i) The first PPE after 1,000 CSN, or
(ii) The first HPCR exposure after 1,000 CSN, or
(iii) The next required inspection to ASB
CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002.
Repetitive Inspection
(4) For spools that have already been inspected using one of the ASB's or SB's listed in Column A of Table 9; OR a
[[Page 77664]]
combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, reinspect the hub and bore in accordance with ASB 72-A812, Revision 4, dated October 2, 2002; the web and hub-to-web transition areas in accordance with ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002; and the stage 3-5 dovetail slot bottoms in accordance with ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002, at the earliest of:
(i) Each PPE with more than 1,000 CSLI and 3,500 CSN, or
(ii) From July 29, 2001, through January 27, 2003, before the cycle limits of Table 4.
(iii) After January 27, 2003, before the cycle limits of Table 5.
Spool Disposition
(5) If inspection findings equal or exceed the reject limits established by ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002, or ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, or ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002; replace spool before further flight.
Spool Reinstallation Limit
(6) After the effective date of this AD, do not install any engine that has an HPCR stage 3-9 spool, P/N's 1781M52P01, 1781M52P02, 1854M95P02, 1854M95P05, and 9380M28P05, installed where the spool has 10,500 or more CSN.
CF6-80C2 9 and 10-Inch Billet Spools
(j) For CF6 HPCR stage 3-9 spool, P/Ns 1333M66G01, 1333M66G03, 1333M66G07, 1333M66G09, 1781M53G01,1781M53G02, 1781M53G03, 1781M53G04, 1781M53G06, 1781M53G07, 1781M53G08, 1781M53G09, 1854M95P01, 1854M95P03, 1854M95P04, 1854M95P06, and 1854M95P07, do the following:
Initial Inspection
(1) If the spool has greater than 7,000 CSN on the effective date of this AD and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 9; OR a combination of one procedure from Column B AND one from Column C; OR a combination of one procedure from Column D AND one from Column E, or if the spool has not been inspected using ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, or an earlier revision of ASB 72-A0848 or SB 72-0848, inspect the hub and bore in accordance with ASB CF6-80C2 S/ B 72-A0812, Revision 4, dated October 2, 2002; and the web and hub- to-web transition areas in accordance with ASB CF6-80C2 S/B 72- A0848, Revision 8, dated October 2, 2002, before further flight.
(2) If the spool has 7,000 or fewer CSN on the effective date of this AD, and has not already been inspected using one of the ASB's or SB's listed in Column A of Table 9; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect the hub and bore in accordance with ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002, at the earliest of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 3,000 CSN, or
(iii) From July 29, 2001, through January 27, 2003, before 7,000 CSN, and after January 27, 2003, before 3,500 CSN.
(3) If the spool has 7,000 or fewer CSN on the effective date of this AD, and has not already been inspected using ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, or an earlier revision of ASB 72-A0848 or SB CF6-80C2 72-0848, inspect the web and the web and hub-to-web transition areas in accordance with CF6-80C2 S/B 72- A0848, Revision 8, dated October 2, 2002, at the earliest of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 3,000 CSN, or
(iii) From July 29, 2001, through July 28, 2003, before 7,000 CSN and after July 28, 2003, before 3,500 CSN.
(4) For spools that have not been inspected using ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002, or an earlier revision of ASB 72-A0934, inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) Within 4,000 additional CIS after the effective date of this AD.
Repetitive Inspection
(5) For spools that have already been inspected using one of the ASB's or SB's listed in Column A of Table 9; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, reinspect the hub and bore in accordance with the requirements of ASB CF6-80C2 S/B 72- A0812, Revision 4, dated October 2, 2002, and the web and hub-to-web transition areas in accordance with ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, at the earlier of:
(i) Each PPE with more than 1,000 CSLI and 3,500 CSN, or
(ii) From July 29, 2001, through January 27, 2003, before the cycle limits of Table 6, and after January 27, 2003, before the cycle limits of Table 5.
Spool Disposition
(6) If inspection findings equal or exceed the reject limits established by ASB CF6-80C2 S/B 72-A0812, Revision 4, dated Revision 4, dated October 2, 2002, or ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, or ASB CF6-80C2 S/B 72\A0934, Revision 4, dated October 2, 2002; replace spool before further flight.
Spool Reinstallation Limit
(7) After the effective date of this AD, do not install any engine that has an HPCR stage 3-9 spool, P/N's 1333M66G01, 1333M66G03, 1333M66G07, 1333M66G09, 1781M53G01, 1781M53G02, 1781M53G03, 1781M53G04, 1781M53G06, 1781M53G07, 1781M53G08, 1781M53G09, 1854M95P01, 1854M95P03, 1854M95P04, 1854M95P06 and 1854M95P07, installed where the spool has 10,500 or more CSN.
CF6-80C2 8-Inch Billet 2-Piece Spools
(k) For CF6 HPCR stage 3-9 spool, P/N's 1333M66G10, 1781M53G05, 1781M53G010, and 1854M95P08, do the following:
(1) If the spool has not already been inspected using one of the ASB's or SB's listed in Column A of Table 9; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect hub and bore in accordance with the piece-part level inspection of ASB 72- A0812, Revision 4, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
(2) For spools that have not been inspected using ASB 72-A0848, Revision 8, dated October 2, 2002, or an earlier revision of ASB 72- A0848, or SB 72-0848, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB CF6-80C2 S/B 72- A0848, Revision 8, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
(3) For spools that have not been inspected using ASB CF6-80C2 S/B 72-A0934, Revision 3, dated October 2, 2002, or an earlier revision of ASB 72-A0934, inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
Spool Disposition
(4) If inspection findings equal or exceed the reject limits established by ASB CF6-80C2 S/B 72-A0812, Revision 4, dated October 2, 2002, or ASB CF6-80C2 S/B 72-A0848, Revision 8, dated October 2, 2002, or ASB CF6-80C2 S/B 72-A0934, Revision 4, dated October 2, 2002; replace spool before further flight.
CF6-80E1 9&10-Inch Billet Spools
(l) For CF6 HPCR stage 3-9 spool, P/N's 1669M22G01, 1669M22G03, 1782M22G01 and 1782M22G02, do the following:
Initial Inspection
(1) If the spool has greater than 7,000 CSN and has not already been inspected using one of the ASB's listed in Column A of the following Table 10; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, OR if the spool has not been inspected using ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002, or an earlier revision of ASB 72-A0126, or SB 72-0126, inspect the hub and bore in accordance with ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002; and the web and hub-to-web transition areas in accordance with ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002, before further flight.
[[Page 77665]]
Table 10
Procedures (70-32-XX) in standard practices manual GEK9250
CF6-80E1 SB No. Column A
Column B
Column C
Column D
Column E
ASB 72-A0135, dated August 13, 70-32-09, Revision 70-32-10, Revision 70-32-13,
70-32-14, TR 70- 1998.
71, dated October 71, dated October Temporary
26, dated August 1, 1995.
1, 1995.
Revision (TR), 70- 26, 1996. 25, dated August 26, 1996. ASB 72-A0135, Revision 1, dated 70-32-09, Revision 70-32-10, Revision 70-32-13, Revision 70-32-14, Revision October 28, 1999.
71, dated
71, dated
72, dated
71, dated November 15, 1996. November 15, 1996. November 15, 1996. November 15, 1996. ASB 72-A0135, Revision 2, dated 70-32-09, Revision 70-32-10, Revision 70-32-13, Revision 70-32-14, Revision June 6, 2001.
74, dated May 1, 74, dated May 1, 73, dated
73, dated 1998.
-
November 1, 1997. November 1, 1997. ASB CF6-80E1 S/B 72-A0135,
.................. 70-32-10, Revision 70-32-13, Revision 70-32-14, Revision Revision 3, dated October 2,
75, dated
75, dated
75, dated 2002.
December 15, 1998. December 15, 1998. December 15, 1998. 70-32-13, TR 70- 70-41, TR 70-42, 41, dated
dated February February 10, 1999. 10, 1999. 70-31-13, Revision 70-31-14, Revision 76, dated May 15, 76, dated May 15, 1999.
-
70-31-17, TR 70- 70-31-18, TR 70- 39, dated
40, dated December 15, 1998. December 15, 1998. 70-31-17, Revision 70-31-18, Revision 76, dated May 15, 76, dated May 15, 1999.
-
70-31-17 TR 70-47, 70-31-18 TR 70-48, dated October 28, dated October 28, 1999.
-
(2) If the spool has 7,000 or fewer CSN and has not already been inspected using one of the ASB's listed in Column A of Table 10; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, OR if the spool has not been inspected using ASB CF6-80E1 S/B 72- A0126, Revision 5, dated October 2, 2002, or an earlier revision of ASB 72-A0126, or SB 72-0126, inspect the hub and bore in accordance with ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002; and the web and hub-to-web transition areas in accordance with ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002, at the earliest of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 3,000 CSN, or
(iii) From July 29, 2001, through January 27, 2003, before 7,000 CSN, and after January 27, 2003, before 3,500 CSN.
(3) Spools not previously inspected using ASB CF6-80E1 S/B 72- A0137, Revision 4, dated October 2, 2002, or an earlier revision of ASB 72-0137, or SB 72-0137, inspect stage 3-5 dovetail slot bottoms in accordance with the requirements of ASB CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 2002, at the earliest of:
(i) The first PPE after 1,000 CSN, or
(ii) The first HPCR exposure after 1,000 CSN, or
(iii) The next required inspection to ASB
CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002.
Repetitive Inspection
(4) For spools that have already been inspected using one of the ASB's listed in Column A of Table 10; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect the hub and bore in accordance with the requirements of ASB CF6-80E1 S/B 72- A0135, Revision 3, dated October 2, 2002, the web and hub-to-web transition areas in accordance with ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002, and the stage 3-5 dovetail slot bottoms in accordance with ASB CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 2002, at the earlier of:
(i) Each PPE with more than 1,000 CSLI and 3,500 CSN, or
(ii) From July 29, 2001, through January 27, 2003, before the cycle limits of Table 6, and after January 27, 2003, before the cycle limits of Table 5.
Spool Disposition
(5) If inspection findings equal or exceed the reject limits established by ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002; ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002; and ASB CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 2002; replace spool before further flight.
Spool Reinstallation Limit
(6) After the effective date of this AD, do not install any engine that has an HPCR stage 3-9 spool, P/N's 1669M22G01, 1669M22G03, 1782M22G01, and 1782M22G02, installed where the spool has 10,500 or more CSN.
CF6-80E1 8-Inch Billet 2-Piece Spools
(m) For CF6 HPCR stage 3-9 spool, P/N 1782M22G04, do the following:
(1) If the spool has not already been inspected using one of the ASB's or SB's listed in Column A of the following Table 9; OR a combination of one procedure from Column B and one from Column C; OR a combination of one procedure from Column D and one from Column E, inspect hub and bore in accordance with the piece-part level inspection of ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
(2) For spools that have not been inspected using ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002, or an earlier revision of ASB 72-A0126, or SB 72-0126, inspect the web and hub-to- web transition areas in accordance with ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
(3) For spools that have not been inspected using ASB CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 2002, or an earlier revision of ASB 72-A0137, or SB 72-0137, inspect the stage 3-5 dovetail slot bottoms in accordance with ASB CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
Spool Disposition
(4) If inspection findings equal or exceed the reject limits established by ASB CF6-80E1 S/B 72-A0135, Revision 3, dated October 2, 2002; ASB CF6-80E1 S/B 72-A0126, Revision 5, dated October 2, 2002; and ASB CF6-80E1 S/B 72-A0137, Revision 4, dated October 2, 2002; replace spool before further flight.
Reporting Requirements
(n) Within five calendar days of inspection, report the results of inspections that equal or exceed the reject criteria to: Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive park, Burlington, MA 01803-5299; telephone (781) 238-7147; fax (781) 238-7199. Reporting requirements have been approved by the Office of Management and
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Budget and assigned OMB control number 2120-0056. Be sure to include the following information:
(1) Part Number.
(2) Serial Number.
(3) Spool CSN.
(4) Spool CSLI.
(5) Date and location where inspection was done.
Definitions
(o) For the purpose of this AD, the following definitions apply:
(1) A module level exposure is a separation of the fan module from the engine.
(2) An HPC rotor exposure is a HPC top or bottom case removal.
(3) A PPE is a disassembly and removal of the stage 3-9 spool from the HPCR structure, regardless of any blades, locking lugs, bolts or balance weights assembled to the spool.
(4) An ESV is the introduction of an engine into the shop where the separation of a major engine flange will occur after the effective date of this AD.
(5) The following maintenance actions, or any combination, are not considered ESV's for requiring repeat inspections:
(i) Introduction of an engine into a shop solely for removal of the compressor top or bottom case for airfoil maintenance or variable stator vane bushing replacement.
(ii) Introduction of an engine into a shop solely for removal or replacement of the Stage 1 Fan Disk.
(iii) Introduction of an engine into a shop solely for replacement of the Turbine Rear Frame.
(iv) Introduction of an engine into a shop solely for replacement of the Accessory and/or Transfer Gearboxes.
(v) Introduction of an engine into a shop solely for replacement of the Fan Forward Case.
Alternative Methods of Compliance
(p) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Engine Certification Office (ECO). Operators must submit their request through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, ECO.
Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the ECO.
Special Flight Permits
(q) Special flight permits may be issued in accordance with Sec. Sec. 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be done.
Documents That Have Been Incorporated By Reference
(r) The inspections must be done in accordance with the following GE Aircraft Engines alert service bulletins (ASB's):
Document No.
Pages Revision
Date
ASB CF6-50 S/B 72-A1108.....................
All
5 October 2, 2002. Total pages: 7. ASB CF6-50 S/B 72-A1131.....................
All
4 Do. Total pages: 43. ASB CF6-50 S/B 72-A1157.....................
All
4 Do. Total pages: 38. ASB CF6-80A S/B 72-A0678....................
All
5 Do. Total pages: 7. ASB CF6-80A S/B 72-A0691....................
All
5 Do. Total pages: 43. ASB CF6-80A S/B 72-A0719....................
All
5 Do. Total pages: 38. ASB CF6-80C2 S/B 72-A0812...................
All
4 Do. Total pages: 6. ASB CF6-80C2 S/B 72-A0848...................
All
8 Do. Total pages: 43. ASB CF6-80C2 S/B 72-A0934...................
All
4 Do. Total pages: 38. ASB CF6-80E1 S/B 72-A0126...................
All
5 Do. Total pages: 44. ASB CF6-80E1 S/B 72-A0135...................
All
3 Do. Total pages: 6. ASB CF6-80E1 S/B 72-A0137...................
All
4 Do. Total pages: 38.
This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from General Electric Company via Lockheed Martin Technology Services, 10525 Chester Road, Suite C, Cincinnati, Ohio 45215, telephone (513) 672-8400, fax (513) 672- 8422. Copies may be inspected at the FAA, New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA; or at the Office of the
Effective Date
(s) This amendment becomes effective on January 23, 2003.
Issued in Burlington, Massachusetts, on December 11, 2002. Francis A. Favara, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service.
[FR Doc. 02-31754 Filed 12-18-02; 8:45 am]
BILLING CODE 4910-13-U