Airworthiness directives: General Electric Co.,
[Federal Register: June 12, 2002 (Volume 67, Number 113)]
[Proposed Rules]
[Page 40239-40249]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr12jn02-21]
Proposed Rules Federal Register
This section of the FEDERAL REGISTER contains notices to the public of the proposed issuance of rules and regulations. The purpose of these notices is to give interested persons an opportunity to participate in the rule making prior to the adoption of the final rules.
[[Page 40239]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2001-NE-26-AD]
RIN 2120-AA64
Airworthiness Directives; General Electric Company (GE) CF6-45, - 50, -80A, -80C2, and -80E1 Turbofan Engines
AGENCY: Federal Aviation Administration, DOT.
ACTION: Notice of proposed rulemaking (NPRM).
SUMMARY: The Federal Aviation Administration (FAA) proposes to supersede 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 an initial and repetitive ultrasonic and eddy current inspections of certain HPCR stage 3-9 spools for cracks. This proposal would remove the AD that requires special handling of the spools during fluorescent-penetrant inspection, and would adjust and combine the initial and repetitive inspection requirements, currently listed in two AD's, into one AD for the HPCR stage 3-9 spool. This proposal aligns repetitive inspection requirements with the more stringent initial inspection requirements required 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 in the proposed AD are intended to prevent cracks which can cause separation of the HPCR stage 3-9 spool and possible uncontained engine failure.
DATES: Comments must be received by August 12, 2002.
ADDRESSES: Submit comments in triplicate to the Federal Aviation Administration (FAA), New England Region, Office of the Regional Counsel, Attention: Rules Docket No. 2001-NE-26-AD, 12 New England Executive Park, Burlington, MA 01803-5299. Comments may be inspected at this location, by appointment, between 8 a.m. and 4:30 p.m., Monday through Friday, except Federal holidays. Comments may also be sent via the Internet using the following address: ``9-ane-adcomment@faa.gov''. Comments sent via the Internet must contain the docket number in the subject line.
The service information referenced in the proposed rule 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 FAA, New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA.
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) 238-07147; fax (781) 238-7199.
SUPPLEMENTARY INFORMATION:
Comments Invited
Interested persons are invited to participate in the making of the proposed rule by submitting such written data, views, or arguments as they may desire. Communications should identify the Rules Docket number and be submitted in triplicate to the address specified above. All communications received on or before the closing date for comments, specified above, will be considered before taking action on the proposed rule. The proposals contained in this action may be changed in light of the comments received.
Comments are specifically invited on the overall regulatory, economic, environmental, and energy aspects of the proposed rule. All comments submitted will be available, both before and after the closing date for comments, in the Rules Docket for examination by interested persons. A report summarizing each FAA-public contact concerned with the substance of this proposal will be filedin the Rules Docket.
Commenters wishing the FAA to acknowledge receipt of their comments submitted in response to this action must submit a self-addressed, stamped postcard on which the following statement is made: ``Comments to Docket Number 2001-NE-26-AD.'' The postcard will be date stamped and returned to the commenter.
Availability of NPRM's
Any person may obtain a copy of this NPRM by submitting a request to the FAA, New England Region, Office of the Regional Counsel, Attention: Rules Docket No. 2001-NE-26-AD, 12 New England Executive Park, Burlington, MA 01803-5299.
Discussion
On August 29, 1995, the FAA issued AD 95-18-14, Amendment 39-9361 (60 FR 46216, September 6, 1995), to require specific handling of the HPCR 3-9 spool during fluorescent penetrant inspection whenever that inspection is performed on these spools. That action was prompted by a report of an uncontained failure of a General Electric Company (GE) CF6-50 HPCR stage 3-9 spool. This requirement, adopted at that time by that AD, has since been incorporated in General Electric fluorescent penetrant inspection (FPI) Standard Practice 70-32-02.
On October 18, 1999, the FAA issued AD 99-24-15, Amendment 39-11440 (64 FR 66554, November 29, 1999), to require more stringent ultrasonic and eddy current inspection intervals for certain HPCR stage 3-9 spools, added CF6-80E1 engines to the inspection program, added inspection requirements for spools manufactured from 8 inch diameter billet, added inspection requirements for stage 3-5 blade slot bottoms, and added inspection requirements for web and hub-to-web transition areas. Airworthiness Directive 99-24-15 superseded AD 95-23-03, Amendment 39-9423 (60 FR 57803, November 21, 1995). Subsequent to that action, there was an additional HPCR stage 3-9 spool separation in service and a reassessment was made of the adequacy of the existing program in place at that time, to prevent a HPCR stage 3-9 spool cracking and separation. Based on that assessment, the FAA determined there was a need to make changes to AD 99-24-15.
[[Page 40240]]
On August 10, 2000, the FAA issued AD 2000-16-12, Amendment 39- 11868 (65 FR 50623, August 21, 2000), to require initial ultrasonic and eddy current inspections of certain HPCR stage 3-9 spools for cracks at a further accelerated rate relative to the requirements of AD 99-24-15. AD 2000-16-12 required initial inspection, on a priority basis, of HPCR stage 3-9 spools that had higher probability of failure based on service life. AD 2000-16-12 did not require repetitive inspection requirements. Certain inspection requirements of AD 99-24-15, which are still applicable today, are no longer consistent with that recent corrective action. Therefore, a comprehensive initial and repetitive inspection program is being proposed for the affected 3-9 spools still in service. This proposed rule combines the requirements of AD 99-24-15 and AD 2000-16-12 with the following additional changes:
Extends the accelerated initial inspection requirements of AD 2000-16-12 beyond July 28, 2001,
Relaxes initial compliance requirement for the CF6-50 and CF6-80A 13-inch billet spools to make them consistent with 9 and 10- inch billet spools,
Adds 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,
Replaces engine shop visit inspection threshold limits for certain spools with cyclic limits,
Adds a time limit for slot bottom inspection for 13-inch billet spools for CF6-50, -80A engines and for 9-inch and 10-inch billet spools for CF6-50, -80A, and -80C engines,
Adds time limitation for the initial inspection and adds repeat inspection intervals for stage 3-5 slot bottom inspection for certain spools,
Adds a time limit for one-time inspection of 8-inch billet 2-piece spools, and
Provides for an alternative modular inspection for the slot bottoms,
The action was prompted by a report of an uncontained failure of an HPCR 3-9 spool. These conditions, if not corrected, could result in separation of the HPCR stage 3-9 spool and a possible uncontained engine failure.
Manufacturer's Service Information
The FAA has reviewed and approved the technical contents of the following GE Alert Service Bulletins (ASB's):
ASB GE CF6-50 72-A1108, Revision 4, dated June 6, 2001 ASB GE CF6-50 72-A1131, Revision 3, dated June 6, 2001 ASB GE CF6-50 72-A1157, Revision 3, dated January 31, 2002 ASB GE CF6-80A 72-A0678, Revision 4, dated June 6, 2001 ASB GE CF6-80A 72-A0691, Revision 4, dated June 6, 2001 ASB GE CF6-80A 72-A0719, Revision 4, dated January 31, 2002 ASB GE CF6-80C2 72-A0812, Revision 3, dated June 6, 2001 ASB GE CF6-80C2 72-A0848, Revision 7, dated June 6, 2001 ASB GE CF6-80C2 72-A0934, Revision 3, dated January 31, 2002 ASB GE CF6-80E1 72-A0135, Revision 2, dated June 6, 2001 ASB GE CF6-80E1 72-A0126, Revision 4 , dated June 6, 2001 ASB GE CF6-80E1 72-A0137, Revision 3, dated January 31, 2002
Those ASB's describe procedures for eddy current and ultrasonic inspections of HPCR stage 3-9 spools for cracks.
FAA's Determination of an Unsafe Condition and Proposed Actions
Since an unsafe condition has been identified that is likely to exist or develop on other GE CF6-45, -50, -80A, -80C2, and -80E1 turbofan engines of this same type design, the proposed AD would supersede AD 95-18-14, AD 99-24-15, and AD 2000-16-12 to require initial and repetitive ultrasonic and eddy current inspections. The actions would be required to be done in accordance with the service bulletin described previously.
Interim Actions
These proposed actions are considered interim actions, and may be changed in future rulemaking actions.
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 proposed 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 proposed rule.
For the reasons discussed above, I certify that this proposed regulation (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) if promulgated, 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 copy of the draft regulatory evaluation prepared for this action 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, Safety.
The Proposed Amendment
Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration proposes to amend 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:
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 40241]]
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, 1781M53G01, 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:
CF6-50 16-inch billet spools
(a) For CF6 HPCR stage 3-9 spool, part numbers (P/N's) 9136M89G02, 9136M89G06, 9253M85G02, 9273M14G01, 9331M29G01, and for P/N 9136M89G08 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
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
MPOJ1801
[[Page 40242]]
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 72- A1108, Revision 4, dated June 6, 2001, and the following compliance times:
Table 3
CF6-50 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, Revision 70-32-13,
70--32-14, TR, 70- January 31, 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 72-888, 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 40243]]
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 70-42 December 14, 1990.
41, dated
dated February February 10, 1999. 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.
(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 by 3,500 CSN, whichever occurs earlier.
(2) For spools that have not been inspected in accordance with the requirements of ASB CF6-50 72-A1131, Revision 3, dated June 6, 2001, or an earlier revision of ASB 72-A1131 or SB 72-1131, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB 72-A1131, Revision 3, dated June 6, 2001, at the first PPE after 1,000 CSN, but not later than 4,000 additional cycles in-service (CIS) after the effective date of this AD.
(3) For spools that have not been inspected in accordance with the requirements of ASB CF6-50 72-A1157, Revision 3, dated January 31, 2002, or an earlier revision of ASB 72-A1157, inspect the stage 3-5 dovetail slot bottoms in accordance with the requirements of ASB 72-A1157, Revision 3 dated January 31, 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 ASB72-A1108, Revision 4, dated June 6, 2001.
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 72-A1108, Revision 4, dated June 6, 2001, and the stage 3-5 dovetail slot bottoms in accordance with ASB 72-A1157, Revision 3, dated January 31, 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 Table 4.
Table 4
CSN at last inspection
Reinspect 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 Table 5.
Table 5
CSN at last inspection
Reinspect 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
(5) If inspection findings equal or exceed the reject limits established by ASB 72-A1108, Revision 4, dated June 6, 2001, or ASB 72-A1131, Revision 3, dated June 6, 2001, or ASB 72-A1157, Revision 3, dated January 31, 2002; replace spool before further flight.
CF6-50 13-inch billet spools
(b) For CF6 HPC Rotor Stage 3-9 Spool, P/N's 9136M89G03, 9136M89G07, 9136M89G09, 9136M89G17, 9136M89G18, 9253M85G01, and 9136M89G08 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 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 72-A1108, Revision 4, dated June 6, 2001 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
[[Page 40244]]
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 72-A1108, Revision 4, dated June 6, 2001, by 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 in accordance with the requirements of ASB 72-A1131, Revision 3, dated June 6, 2001, or an earlier revision of ASB 72-A1131, or SB 72-1131, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB 72-A1131, Revision 3, dated June 6, 2001, by 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 in accordance with the requirements of ASB 72-A1157, Revision 3, dated January 31, 2002, or an earlier revision of ASB 72-A1157, inspect the stage 3-5 dovetail slot bottoms in accordance with the requirements of ASB 72- A1157, Revision 3, dated January 31, 2002, by 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 72-A1108, Revision 4, dated June 6, 2001, 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.
(6) If inspection findings equal or exceed the reject limits established by ASB 72-A1108, Revision 4, dated June 6, 2001; or ASB 72-A1131, Revision 3, dated June 6, 2001; or ASB 72-A1157, Revision 3, dated January 31, 2002; replace spool before further flight.
CF6-50 9&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 72-A1108, Revision 4, dated June 6, 2001 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 72-A1108, Revision 4, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A1131, Revision 3, dated June 6, 2001, or an earlier revision of ASB 72-A1131, or SB 72-1131, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB 72-A1131, Revision 3, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A1157, Revision 3, dated January 31, 2002, or an earlier revision of ASB 72-A1157, inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB 72- A1157, Revision 3, dated January 31, 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 72-A1108, Revision 4, dated June 6, 2001, 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.
(6) If inspection findings equal or exceed the reject limits established by ASB 72-A1108, Revision 4, dated June 6, 2001; or ASB 72-A1131, Revision 3, dated June 6, 2001; or ASB 72-A1157, Revision 3, dated January 31, 2002; replace spool before further flight.
(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.
CF6-508-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 ASB CF6-50 72-A1108, Revision 4, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A1131, Revision 3, dated June 6, 2001, or an earlier revision of ASB 72-A1131, or SB 72-1131, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB 72-A1131, Revision 3, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A1157, Revision 3, dated January 31, 2002, or an earlier revision of ASB 72-A1157, inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB 72- A1157, Revision 3, dated January 31, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
(4) If inspection findings equal or exceed the reject limits established by ASB 72-A1108, Revision 4, dated June 6, 2001; or ASB 72-A1131, Revision 3, dated June 6, 2001; or ASB 72-A1157, Revision 3, dated January 31, 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 72 A0678, Revision 4, dated June 6, 2001, and the following compliance times:
[[Page 40245]]
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 71, dated 70-32-10, Revision 71, dated 70-32-13, Temporary Revision 70-32-14, TR 70-26, dated March 19, 1991
October 1, 1995
October 1, 1995
(TR), 70-25, dated August August 26, 1996 26, 1996 SB 72-500, Revision 4, dated 70-32-09, Revision 72, dated 70-32-10, Revision 72, dated 70-32-13, Revision 72, dated 70-32-14, Revision 72, dated July 1, 1991
November 15, 1996
November 15, 1996
November 15, 1996
November 15, 1996 SB 72-500, Revision 5, dated 70-32-09, Revision 74, dated 70-32-10, Revision 74, dated 70-32-13, Revision 73, dated 70-32-14, Revision 73, dated November 7, 1994
May 1, 1998
May 1, 1998
November 1, 1997
November 1, 1997 SB 72-500, Revision 6, dated ............................. 70-32-10, Revision 75, dated 70-32-13, Revision 75, dated 70-32-14, Revision 75, dated December 22, 1995
December 15, 1998
December 15, 1998
December 15, 1998 SB 72-583, Original, dated ............................. ............................. 70-32-13, TR 70-41, dated 70-32-14, TR 70-42, dated December 20, 1990
February 10, 1999
February 10, 1999 SB 72-583, Revision 1, dated ............................. ............................. 70-32-13, Revision 76, dated 70-32-14, Revision 76, dated March 18, 1991
May 15, 1999
May 15, 1999 SB 72-583, Revision 2, dated ............................. ............................. 70-32-17, TR 70-39, dated 70-32-18, TR 70-40, dated July 15, 1991
December 15, 1998
December 15, 1998 SB 72-583, Revision 3, dated ............................. ............................. 70-32-17, Revision 76, dated 70-32-18, Revision 76, dated July 24, 1991
May 15, 1999
May 15, 1999 SB 72-583, Revision 4, dated ............................. ............................. 70-32-17, TR 70-47, dated 70-32-18, TR 70-48, dated September 15, 1993
October 28, 1999
October 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
(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 within 3,500 CSN, whichever occurs earlier.
(2) For spools that have not been inspected in accordance with the requirements of ASB 72-A0691, Revision 4, dated June 6, 2001, or an earlier revision of ASB 72-A0691, or SB 72-0691, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB 72-A0691, Revision 4, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A0719, Revision 4, dated January 31, 2002, or an earlier revision of ASB 72-A0719, inspect thestage 3-5 dovetail slot bottom in accordance with the requirements of ASB 72- A0719, Revision 4, dated January 31, 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 72-A0678, Revision 4, dated June 6, 2001.
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 72-A0678, Revision 4, dated June 6, 2001; and the dovetail slot bottoms in accordance with the requirements of ASB 72-A0719, Revision 4, dated January 31, 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, or
(iii) After January 27, 2003, before the cycle limits of Table 5.
(5) If inspection findings equal or exceed the reject limits established by ASB 72-A0678, Revision 4, dated June 6, 2001; or ASB 72-A0691, Revision 4, dated June 6, 2001; or ASB A0719, Revision 4, dated January 31, 2002; replace spool before further flight.
(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 CF6-50 72-A0678, Revision 4, dated June 6, 2001 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
[[Page 40246]]
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 CF6-50 72-A0678, Revision 4, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A0691, Revision 4, dated June 6, 2001, or an earlier revision of ASB 72-A0691, or SB 72-0691, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB 72-A0691, Revision 4, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A0719, Revision 4, dated January 31, 2002, or an earlier revision of ASB 72-A0719 inspect the dovetail slot bottom in accordance with the requirements of ASB 72-A0719, Revision 4, dated January 31, 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) 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, inspect hub and bore in accordance with alert ASB CF6-50 72-A0678, Revision 4, dated June 6, 2001, 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, inspect hub and bore in accordance with ASB CF6-50 72-A0678, Revision 4, dated June 6, 2001, 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.
(7) If inspection findings equal or exceed the reject limits established by ASB 72-A0678, Revision 4, dated June 6, 2001; or ASB 72-A0691, Revision 4, dated June 6, 2001; or ASB A0719, Revision 4, dated January 31, 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 CF6-50 72-A0678, Revision 4, dated June 6, 2001 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 CF6-50 72-A0678, Revision 4, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A0691, Revision 4, dated June 6, 2001, or an earlier revision of ASB 72-A0691, or SB 72-0691, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB 72-A0691, Revision 4, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A0719, Revision 4, dated January 31, 2002, or an earlier revision of ASB 72-A0719 inspect the dovetail slot bottom in accordance with the requirements of ASB 72-A0719, Revision 4, dated January 31, 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, inspect hub and bore in accordance with ASB CF6-50 72-A0678, Revision 4, dated June 6, 2001, 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
Reinspect 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
(6) If inspection findings equal or exceed the reject limits established by ASB 72-A0678, Revision 4, dated June 6, 2001; or ASB 72-A0691, Revision 4, dated June 6, 2001; or ASB A0719, Revision 4, dated January 31, 2002; replace spool before further flight.
(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 ASB 72-A0678, Revision 4, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A0691, Revision 4, dated June 6, 2001, or an earlier revision of ASB 72-A0691, or SB 72-0691, inspect the web and hub-to-web transition areas in accordance with the requirements of ASB 72-A0691, Revision 4, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A0719, Revision 4, dated January 31, 2002, or an earlier revision of ASB 72-A0719 inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB 72- A0719, Revision 4, dated January 31, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
(4) If inspection findings equal or exceed the reject limits established by ASB 72-A0678, Revision 4, dated June 6, 2001; or ASB 72-A0691, Revision 4, dated June 6, 2001; or ASB 72-A0719, Revision 4, dated January 31, 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, 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
[[Page 40247]]
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 72-A0812, Revision 3, dated June 6, 2001, 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 70-32-09, Revision 71, dated 70-32-10, Revision 71, dated 70-32-13, Temporary Revision 70-32-14, TR 70-26, dated 14, 1991
October 1, 1995
October 1, 1995
(TR), 70-25, dated August August 26, 1996 26, 1996 SB 72-418, Revision 3,
70-32-09, Revision 72, dated 70-32-10, Revision 72, dated 70-32-13, Revision 72, dated 70-32-14, Revision 72, dated November 7, 1994
November 15, 1996
November 15, 1996
November 15, 1996
November 15, 1996 SB 72-418, Revision 4,
70-32-09, Revision 74, dated 70-32-10, Revision 74, dated 70-32-13, Revision 73, dated 70-32-14, Revision 73, dated December 22, 1995
May 1, 1998
May 1, 1998
November 1, 1997
November 1, 1997 SB 72-758, Original, dated ............................. 70-32-10, Revision 75, dated 70-32-13, Revision 75, dated 70-32-14, Revision 75, dated November 7, 1994
December 15, 1998
December 15, 1998
December 15, 1998 SB 72-758, Revision 1, dated ............................. ............................. 70-32-13, TR 70-41, dated 70-32-14, TR 70-42, dated December 22, 1995
February 10, 1999
February 10, 1999 SB 72-812, Original, dated ............................. ............................. 70-32-13, Revision 76, dated 70-32-14, Revision 76, dated November 6, 1995
May 15, 1999
May 15, 1999 SB 72-812, Revision 1, dated ............................. ............................. 70-32-17, TR 70-39, dated 70-32-18, TR 70-40, dated January 30, 1998
December 15, 1998
December 15, 1998 ASB 72-A0812, Revision 2, ............................. ............................. 70-32-17, Revision 76, dated 70-32-18, Revision 76, dated dated October 28, 1999
May 15, 1999
May 15, 1999 ASB 72-A0812, Revision 3, ............................. ............................. 70-32-17, TR 70-47, dated 70-32-18, TR 70-48, dated dated June 6, 2001
October 28, 1999
October 28, 1999
(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 in accordance with the requirements of ASB 72-A0848, Revision 7, dated June 6, 2001, 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 72-A0848, Revision 7, dated June 6, 2001, at the earliest of:
(i) The first PPE after 1000 CSN, or
(ii) The next required inspection to ASB 72-A0812, Revision 3, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A0934, Revision 3, dated January 31, 2002, or an earlier revision of ASB 72-A0934, inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB 72- A0934, Revision 3, dated January 31, 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 72-A0812, Revision 3, dated June 6, 2001
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 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 72-A812, Revision 3, dated June 6, 2001, the web and hub-to-web transition areas in accordance with ASB 72-A0848, Revision 7, dated June 6, 2001, and the stage 3-5 dovetail slot bottoms in accordance with ASB 72-A0934 Revision 3, dated January 31, 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.
(5) If inspection findings equal or exceed the reject limits established by ASB 72-A0812, Revision 3, dated June 6, 2001, or ASB 72-A0848, Revision 7, dated June 6, 2001, or ASB 72-A0934, Revision 3, dated January 31, 2002; replace spool before further flight.
(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, 1854M95P02, 1854M95P05 and 9380M28P05, installed where the spool has 10,500 or more CSN.
CF6-80C2 9&10-inch billet spools
(j) For CF6 HPCR stage 3-9 spool, P/Ns 1333M66G01, 1333M66G03, 1333M66G07, 1333M66G09, 1781M53G01, 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, and if the spool has not been inspected in accordance with ASB 72-A0848, Revision 7, dated June 6, 2001, or an earlier revision of ASB 72-A0848, or SB 72-0848, inspect the hub and bore in accordance with ASB CF6-50 72- A0812, Revision 3, dated June 6, 2001; and the web and hub-to-web transition areas in accordance with ASB 72-A0848, Revision 7, dated June 6, 2001, 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, and if the spool has not been inspected in accordance with ASB 72-A0848, Revision 7, dated June 6, 2001, or an earlier revision of ASB 72-A0848, or SB 72-0848, inspect the hub and bore in accordance with ASB CF6-50 72- A0812, Revision 3, dated June 6, 2001; and the web and hub-to-web transition areas in accordance with ASB 72-A0848, Revision 7, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A0934, Revision 3, dated January 31,
[[Page 40248]]
2002, or an earlier revision of ASB 72-A0934, inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB 72- A0934, Revision 3, dated January 31, 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
(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 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 72-A0812, Revision 3, dated June 6, 2001, and the web and hub-to-web transition areas in accordance with ASB 72-A0848, Revision 7, dated June 6, 2001, 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.
(5) If inspection findings equal or exceed the reject limits established by ASB 72-A0812, Revision 3, dated June 6, 2001, or ASB 72-A0848, Revision 7, dated June 6, 2001, or ASB 72-A0934, Revision 3, dated January 31, 2002; replace spool before further flight.
(6) 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, 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 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 ASB 72-A0812, Revision 3, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A0848, Revision 7, dated June 6, 2001, 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 72-A0848, Revision 7, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A0934, Revision 3, dated January 31, 2002, or an earlier revision of ASB 72-A0934, inspect the stage 3-5 dovetail slot bottom in accordance with the requirements of ASB 72- A0934, Revision 3, dated January 31, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
(4) If inspection findings equal or exceed the reject limits established by ASB 72-A0812, Revision 3, dated June 6, 2001, or ASB 72-A0848, Revision 7, dated June 6, 2001, or ASB 72-A0934, Revision 3, dated January 31, 2002; replace spool before further flight.
CF6-80E1 9&10-inch billet spools
(1) 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 AND 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, and if the spool has not been inspected in accordance with ASB 72-A0126, Revision 5, dated June 6, 2001, or an earlier revision of ASB 72-A0126, or SB 72-0126, inspect the hub and bore in accordance with ASB CF6-50 72-A0135, Revision 2, dated June 6, 2001; and the web and hub-to-web transition areas in accordance with ASB 72-A0126, Revision 5, dated June 6, 2001, before further flight.
Table 10
CF6-80E1 SB No.
Procedures (70-32-XX) in standard practices manual GEK9250
Column A
Column B
Column C
Column D
Column E
ASB 72-A0135, dated August 70-32-09, Revision 71, dated 70-32-10, Revision 71, dated 70-32-13, Temporary Revision 70-32-14, TR 70-26, dated 13, 1998
October 1, 1995
October 1, 1995
(TR), 70-25, dated August August 26, 1996 26, 1996 ASB 72-A0135, Revision 1, 70-32-09, Revision 72, dated 70-32-10, Revision 72, dated 70-32-13, Revision 72, dated 70-32-14, Revision 72, dated dated October 28, 1999
November 15, 1996
November 15, 1996
November 15, 1996
November 15, 1996 ASB 72-A0135, Revision 2, 70-32-09, Revision 74, dated 70-32-10, Revision 74, dated 70-32-13, Revision 73, dated 70-32-14, Revision 73, dated dated June 6, 2001
May 1, 1998
May 1, 1998
November 1, 1997
November 1, 1997 ............................. 70-32-10, Revision 75, dated 70-32-13, Revision 75, dated 70-32-14, Revision 75, dated December 15, 1998
December 15, 1998
December 15, 1998 ............................. ............................. 70-32-13, TR 70-41, dated 70-32-14, TR 70-42, dated February 10, 1999
February 10, 1999 ............................. ............................. 70-32-13, Revision 76, dated 70-32-14, Revision 76, dated May 15, 1999
May 15, 1999 ............................. ............................. 70-32-17, TR 70-39, dated 70-32-18, TR 70-40, dated December 15, 1998
December 15, 1998 ............................. ............................. 70-32-17, Revision 76, dated 70-32-18, Revision 76, dated May 15, 1999
May 15, 1999 ............................. ............................. 70-32-17, TR 70-47, dated 70-32-18, TR 70-48, dated October 28, 1999
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, and if the spool has not been inspected in accordance with ASB 72-A0126, Revision 5, dated June 6, 2001, or an earlier revision of ASB 72-A0126, or SB 72-0126, inspect the hub and bore in accordance with ASB CF6-50 72-A0135, Revision 2, dated June 6, 2001; and the web and hub-to-web transition areas in
[[Page 40249]]
accordance with ASB 72-A0126, Revision 5, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A0137, Revision 3, dated January 31, 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 72- A0137, Revision 3, dated January 31, 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 72-A0135, Revision 2, dated June 6, 2001.
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 72-A0135, Revision 2, dated June 6, 2001, the web and hub-to-web transition areas in accordance with ASB 72-A0126, Revision 5, dated June 6, 2001, and the stage 3-5 dovetail slot bottoms in accordance with ASB 72-A0137, Revision 3, dated January 31, 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.
(5) If inspection findings equal or exceed the reject limits established by ASB 72-A0135, Revision 2, dated June 6, 2001; ASB 72- A0126, Revision 5, dated June 6, 2001; and ASB 72-A0137, Revision 3, dated January 31, 2002; replace spool before further flight.
(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 ASB 72-A0135, Revision 2, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A0126, Revision 5, dated June 6, 2001, 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 72-A0126, Revision 5, dated June 6, 2001, 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 in accordance with the requirements of ASB 72-A0137, Revision 3, dated January 31, 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 72-A0137, Revision 3, dated January 31, 2002, at the earlier of:
(i) The first PPE after 1,000 CSN, or
(ii) The first ESV after 6,000 CSN.
(4) If inspection findings equal or exceed the reject limits established by ASB 72-A0135, Revision 2, dated June 6, 2001; ASB 72- A0126, Revision 5, dated June 6, 2001; and ASB 72-A0137, Revision 3, dated January 31, 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. Reporting requirements have been approved by the Office of Management and 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.
(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 Secs. 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.
Issued in Burlington, Massachusetts, on June 5, 2002. Francis A. Favara, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service.
[FR Doc. 02-14700Filed6-11-02; 8:45 am]
BILLING CODE 4910-13-P
