### 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

CUSTOMER SUPPORT 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 Rolls--Royce Corporation Publication Services, Indianapolis, Indiana, USA 

## PUBLICATION TRANSMITTAL

# ALERT

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E COPYRIGHT 2012 Rolls--Royce Corporation (unpublished) 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 cycl es 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 lim it information. You must include these mandatory limits in your own approved maintenance schedule, if applicable. 

# SERVICE BULLETIN EXPORT CONTROLLED

## Rolls--Royce SERVICE BULLETIN EXPORT CONTROLLED 

# ALERT

November 30, 2012

Page 2 of 4 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

## Rolls--Royce SERVICE BULLETIN EXPORT CONTROLLED 

# ALERT

November 30, 2012

Page 3 of 4 Revision 1 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

## Rolls--Royce SERVICE BULLETIN EXPORT CONTROLLED 

# ALERT

November 30, 2012

Page 4 of 4 Revision 1 December 5, 2012 AE 3007A--A--72--414

E COPYRIGHT 2012 Rolls--Royce Corporation (unpublished) 2. ACCOMPLISHME NT INSTRUCTIONS None
3. MATERIAL INFORMATION A. Configuration Chart -- Not applicable B. Consumable Materials -- None C. Expendable Parts -- None

CUSTOMER SUPPORT ROLLS-ROYCE