Airworthiness directives: General Electric Co.,

 
CONTENT

[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

  1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.

    Sec. 39.13 [Amended]

  2. 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.

  3. 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.

  4. 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.

  5. 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