December 5, 2012

TO: Recipients of AE 3007A Series Service Bulletins

SUBJECT: Service Bulletin AE 3007A--A--72--414, Engine -- Unpeened or Partially

Peened 2nd--stage High Pressure Turbine Wheel Life Limit Decrease

This letter transmits Revision 1 to the subject service bulletin. Replace the original

issue with this Revision 1.

This is a complete revision.

Revision 1 changes the Planning Information section.

If you have complied with the previous issue of this bulletin, no additional work is

required.

The following list includes the original issue date and all revisions to this bulletin:

Original issue November 30, 2012

Revision 1 December 5, 2012

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ROLLS--ROYCE

Rolls--Royce Corporation

450 South Meridian Street

Indianapolis, IN 46225--1103 USA

Mail Code MC--S2--08

Phone: 317--230--3774

Fax: 317--230--6084

email: indy.pubs.services@rolls--royce.com

CHECK THAT ALL PREVIOUS TRANSMITTALS HAVE BEEN INCORPORATED -- if any have not been received please advise

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November 30, 2012

Page 1 of 4

Revision 1

December 5, 2012

AE 3007A--A--72--414

E COPYRIGHT 2012 Rolls--Royce Corporation (unpublished)

ENGINE -- UNPEENED OR PARTIALLY PEENED 2ND--STAGE HIGH

PRESSURE TURBINE WHEEL LIFE LIMIT DECREASE

1. PLANNING INFORMATION

A. Effectivity

(1) Engines

All AE 3007A, AE 3007A1, AE 3007A1/1, AE 3007A1/2, AE3007A1/3, AE 3007A1E,

AE 3007A1P and AE 3007A3 engines with the 2nd--stage High Pressure Turbine (HPT)

wheel (23069438, 23069592, 23074462, 23074644 or 23075345).

(2) Spares

2nd--stage HPT wheel (23069438, 23069592, 23074462, 23074644 or 23075345).

B. Reason

A crack in the drive shaft fillet of a 2nd--stage HPT wheel was reported during a piece--part

inspection at engine overhaul. The affected HPT wheel had not exceeded the Chapter 5 life

limit.

The results of the analysis, cyclic testing, and field campaign require Chapter 5 life limit

reduction for 2nd--stage HPT wheels that have an unpeened or partially peened drive shaft fillet

as identified by part numbers and serial numbers in this service bulletin.

C. Description

The declared engine cycle life limit (Ref. TASK 05--10--00--800--801, MM) for the 2nd--stage

HPT wheels with an unpeened or partially peened drive shaft fillet will be reduced. The reduced

lives will be effective concurrent with a revision to Chapter 5 of the AE 3007A Series Maintenance

Manual scheduled for January 20, 2013. This revision to Chapter 5 will show the Declared Life Limit

(DLL) changes.

It is mandatory that these parts be replaced when the DLL has expired. The operator must

record both hours and cycles of engine use in the applicable section of the life limited parts

record of the engine logbook.

The DLL for life limited components located in the upper right corner of the engine logbook has

been deleted. Always refer to TASK 05--10--00--800--801 in the Maintenance Manual for current

engine cycle life limit information.

You must include these mandatory limits in your own approved maintenance schedule, if

applicable.

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Revision 1

December 5, 2012

AE 3007A--A--72--414

E COPYRIGHT 2012 Rolls--Royce Corporation (unpublished)

TABLE 1 -- 2nd--stage HPT wheel life limits

PART NUMBER NEW DECLARED

LIFE LIMIT

(FLIGHT CYCLES)

ENGINE MODEL

23069438 9,500 AE 3007A1, A1/1, A1/2, A1/3, A1P, A3

23069592 9,500

(20,000, NOTE 1)

AE 3007A

23074462 9,500

(20,000, NOTE 2)

AE 3007A1, A1/1, A1/3, A1P, A3

7,500

(20,000, NOTE 2)

AE 3007A1E

23074644 9,500 AE 3007A1, A1/1, A1/3, A1P, A3

23075345 9,500

(23,000, NOTE 3)

AE 3007A1, A1/1, A1/3, A1P, A3

9,500

(20,000, NOTE 4)

AE 3007A1/2

NOTE: (1) Some 2nd--stage HPT wheel serial numbers stay at 20,000 DLL. See Table 2.

NOTE: (2) Some 2nd--stage HPT wheel serial numbers stay at 20,000 DLL. See Table 3.

NOTE: (3) Some 2nd--stage HPT wheel serial numbers stay at 23,000 DLL. See Table 4.

NOTE: (4) Some 2nd--stage HPT wheel serial numbers stay at 20,000 DLL. See Table 5.

TABLE 2 -- 2nd--stage HPT wheel serial numbers remaining at 20,000 DLL

P/N 23069592

Affected Serial Numbers

MM503645

MM503721

MM503730

MM503762

MM504038

MM505029

MM505032

MM505033

MM505035

MM505038

MM505042

MM505044

MM505059

MM505062

All S/Ns higher than MM505073

TABLE 3 -- 2nd--stage HPT wheel serial numbers remaining at 20,000 DLL

P/N 23074462

Affected Serial Numbers

MM504890

MM504963

MM504990

MM504995

MM505007

MM505017

MM505025

MM505034

MM505041

MM505045

MM505046

MM505048

MM505054

MM505055

MM505056

All ‘MM’ prefix S/Ns higher than

MM505060

All S/Ns with ‘MW’ prefix
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December 5, 2012

AE 3007A--A--72--414

E COPYRIGHT 2012 Rolls--Royce Corporation (unpublished)

TABLE 4 -- 2nd--stage HPT wheel serial numbers remaining at 23,000 DLL

P/N 23075345

Affected Serial Numbers

MM507646

MM508144

MM508153

MM508176

MM508186

MM508188

MM508205

MM508208

MM508211

MM508221

MM508241

MM508248

MM508251

MM508264

MM508305

MM508311

MM508319

MM508320

MM508322

MM508337

MM508338

MM508382

MM508387

TABLE 5 -- 2nd--stage HPT wheel serial numbers remaining at 20,000 DLL

P/N 23075345

Affected Serial Numbers

MM507646

MM508144

MM508153

MM508176

MM508186

MM508188

MM508205

MM508208

MM508211

MM508221

MM508241

MM508248

MM508251

MM508264

MM508305

MM508311

MM508319

MM508320

MM508322

MM508337

MM508338

MM508382

MM508387

D. Approval

Technical aspects are FAA approved.

E. Manpower -- Not applicable

F. Compliance

Mandatory. Compliance with this service bulletin is mandatory after receipt of revised Chapter 5

showing the Declared Life Limit (DLL) changes (Ref. Description section, Section C). This

service bulletin is associated with a pending FAA Airworthiness Directive (AD) that will mandate

reduced life limits for 2nd--stage HPT wheels with an unpeened or partially peened drive shaft

fillet.

G. Interchangeability -- Not affected

H. Material Availability -- Not applicable

I. Tooling -- Not applicable

J. Weight and Balance -- Not affected

K. Electrical Load Data -- Not affected

L. References

(1) Advance Engineering Memorandum (AEM), CN500016983327.

NOTE: The document above is referenced for the internal use of Rolls-Royce only.

(2) AE 3007A Series Illustrated Parts Catalog (IPC), CSP33002.

(3) AE 3007A Series Maintenance Manual (MM), CSP34022.

M. Prerequisites -- None

N. Corequisites -- None
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Revision 1

December 5, 2012

AE 3007A--A--72--414

E COPYRIGHT 2012 Rolls--Royce Corporation (unpublished)

2. ACCOMPLISHMENT INSTRUCTIONS

None

3. MATERIAL INFORMATION

A. Configuration Chart -- Not applicable

B. Consumable Materials -- None

C. Expendable Parts -- None

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