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 

PUBLICAT 

August 29, 2014 

[I Rolls-Royce 

0 N TRANSMITTAL 

TO: Recipients of AE 3007 A Service Bulletins 

SUBJECT: Service Bulletin AE 3007A-A-72-407, 

Engine - 1st and 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 

Revision 1 

December 6, 2013 

August 29, 2014 

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

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SERVICE 

BULLETIN [I Rolls-Royce 

ENGINE - 1ST AND 2ND-STAGE HIGH PRESSURE TURBINE WHEEL 

LIFE LIMIT DECREASE 

1. PLANNING INFORMATION 

A. Effectivity 

(1) Engines 

All AE 3007A1, 1/1, 1/3, A1 P, A3, A2 engines with a 1st-stage or 2nd-stage high pressure 

turbine wheel (23079946, 23088906, 23088784, 23084520, 23084781, 23088817 or 

23088818) with the affected Serial Numbers. (See TABLES) 

(2) Spares 

All 1st-stage or 2nd-stage high pressure turbine wheel (23079946, 23088906, 23088684, 

23084520, 23084781, 23088817 or 23088818) with the affected Serial Numbers. (See 

TABLES) 

B. Reason 

Fluorescent Pentetrant Inspection results show pitting in the bore of Udimet-720 1st and 

2nd-stage high pressure turbine (HPT) wheels. Investigation shows that the cleaning process of 

wheels during 2007 thru 2010 can be the cause of pitting. Pitting in the bore of the HPT1 and 

HPT2 wheel can reduce the safe life of the component in service. 

A recent analysis of the HPT1 and HPT2 wheels coupled with cyclic testing resulted in a lower 

life than the current Chapter 5 life limit. A risk assessment was completed and requires a 

Chapter 5 life reduction as well as a mandatory Eddy Current Inspection of the possibly affected 

HPT1 and HPT2 wheels when the engine goes to an Authorized Maintenance Center for 

service. 

C. Description 

The declared Engine Cycle Life Limit (ECLL) (Ref. 05-10-00, MM) for the HPT1 and HPT2 

wheels that were permanganate cleaned has been reduced. Chapter 5 of the maintenance 

manual will be revised to show the ECLL changes. 

It is mandatory that these parts be replaced upon expiration of the operating time. The operator 

must record both hours and cycles of engine use in the appropriate section of the life limited 

parts record of the engine logbook. 

NOTE: The ECLL for life limited components located in the upper right corner of the engine 

logbook has been deleted. Always reference 05-01-00 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. 

NOTE: The life limit of a given part must be limited to the lowest Cycle Life Limit based upon 

all engine models in which the given part has operated. The entire engine model 

history of a part must be considered when determining the part life limit. 

December 06, 2013 

Revision 1 

August 29, 2014 

AE 3007A-A-72-407 

© COPYRIGHT 2013, 2014 Rolls-Royce Corporation (unpublished) Page 1 of 7 
I 

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SERVICE BULLETIN 

1ST -STAGE GAS GENERATOR-TURBINE OR HIGH-PRESSURE-TURBINE WHEEL LIFE LIMITS 

PART Declared Life Limits (Flight Cycles) 

NUMBER CURRENT UPDATED ENGINE MODEL 

30,000 30,000 AE 3007A1, A1/1, A1/3, A1 P, A3 

20,000 (NOTE 1) 

23079946 

15,000 15,000 AE 3007A2 

9,400 (NOTE 1) 

30,000 30,000 AE 3007A1, A1/1, A1/3, A1 P, A3 

20,000 (NOTE 2) 

23088906 

15,000 15,000 AE 3007A2 

9,400 (NOTE 2) 

23088784 30,000 30,000 AE 3007A1, A1/1, A1/3, A1 P, A3 

20,000 (NOTE 3) 

NOTE 1: HPT1 wheel serial numbers that were permanganate cleaned. See TABLE 1. 

NOTE 2: HPT1 wheel serial numbers that were permanganate cleaned. See TABLE 2. 

NOTE 3: HPT1 wheel serial numbers that were permanganate cleaned. See TABLE 3. 

TABLE 1 

HPT 1 P/N 23079946 

Serial Numbers that were Permanganate Cleaned and have a Reduced Cyclic Life Limit 

P /N 23079946 

Affected Serial Numbers 

MW51830 I MW51853 I MW51864 I MW51869 I MW51878 to MW61890* 

*The following Serial Numbers are excluded 

MW51890 MW51898 MW51901 MW51905 MW51907 MW51908 

MW51909 MW51911 MW51912 MW51913 MW51915 MW51916 

MW51917 MW54699 MW54721 MW55912 MW55915 MW55921 

MW55926 

December 06,2013 AE 3007A-A-72-407 

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TABLE 2 

HPT1 P/N 23088906 

Serial Numbers that were Permanganate Cleaned and have a Reduced Cyclic Life Limit 

P /N 23088906 

Affected Serial Numbers 

MW61743 to MW62098* 

MW65529 I MW65605 I MW65645 I MW65659 

*The following Serial Numbers are excluded 

MW61763 MW61764 MW61991 MW61992 MW62017 MW62025 

MW62030 MW62037 MW62038 MW62039 MW62058 MW62082 

MW62083 MW62084 MW62086 MW62087 MW62089 MW62091 

MW62093 

TABLE 3 

HPT1 P/N 23088784 

Serial Numbers that were Permanganate Cleaned and have a Reduced Cyclic Life Limit 

December 06, 2013 

Revision 1 

August 29, 2014 

P/N 23088784 

Affected Serial Numbers 

MW54511 to MW55109 

AE 3007A-A-72-407 

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SERVICE BULLETIN 

2ND-STAGE GAS GENERATOR-TURBINE OR HIGH-PRESSURE-TURBINE WHEEL LIFE LIMITS 

PART Declared Life Limits (Flight Cycles) 

NUMBER CURRENT UPDATED ENGINE MODEL 

23084520 23,000 23,000 AE 3007A1, A1/1, A1/3, A1 P, A3 

20,000 (NOTE 4) 

23084781 15,000 15,000 AE 3007A2 

11 ,600 (NOTE 5) 

23088817 15,000 15,000 AE 3007A2 

11 ,600 (NOTE 6) 

23088818 23,000 23,000 AE 3007A1, A1/1, A1/3, A1 P, A3 

20,000 (NOTE 7) 

NOTE 4: Certain HPT2 wheel serial numbers that were permanganate cleaned. See TABLE 4. 

NOTE 5: Certain HPT2 wheel serial numbers that were permanganate cleaned. See TABLE 5. 

NOTE 6: Certain HPT2 wheel serial numbers that were permanganate cleaned. See TABLE 6. 

NOTE 7: Certain HPT2 wheel serial numbers that were permanganate cleaned. See TABLE 7. 

TABLE 4 

HPT2 P/N 23084520 

Serial Numbers that were Permanganate Cleaned and have a Reduced Cyclic Life Limit 

MW51936 

MW51954 

MW51961 

MW51989 

MW56076 

December 06, 2013 

Revision 1 

August 29, 2014 

P /N 23084520 

Affected Serial Numbers 

All Serial Numbers with prefix 

XP 

MW50462 to MW63395* 

*The following Serial Numbers are excluded 

MW51946 MW51947 MW51948 MW51951 

MW51955 MW51956 MW51958 MW51959 

MW51962 MW51971 MW51973 MW51974 

MW53634 MW53638 MW53641 MW53647 

MW61025 

MW51953 

MW51960 

MW51980 

MW53924 

AE 3007A-A-72-407 

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TABLE 5 

HPT2 P/N 23084781 

Serial Numbers that were Permanganate Cleaned and have a Reduced Cyclic Life Limit 

MW53652 

MW56063 

P /N 23084 781 

Affected Serial Numbers 

MW53627 to MW63381* 

*The following Serial Numbers are excluded 

MW53654 MW53655 MW53656 MW54422 

MW56065 MW61055 MW61599 MW63360 

TABLE 6 

HPT2 P/N 23088817 

MW56056 

MW63370 

Serial Numbers that were Permanganate Cleaned and have a Reduced Cyclic Life Limit 

MW63263 

MW63299 

MW63355 

MW63436 

MW64127 

MW64228 

MW64313 

MW64362 

MW64407 

December 06, 2013 

Revision 1 

August 29, 2014 

MW63265 

MW63332 

MW63367 

MW63438 

MW64166 

MW64241 

MW64315 

MW64363 

MW64504 

P /N 23088817 

Affected Serial Numbers 

MW63267 MW63269 MW63296 MW63298 

MW63333 MW63334 MW63335 MW63338 

MW63368 MW63372 MW63377 MW63434 

MW63439 MW63441 MW63469 MW63475 

MW64173 MW64175 MW64176 MW64224 

MW64281 MW64283 MW64294 MW64309 

MW64348 MW64349 MW64352 MW64353 

MW64375 MW64379 MW64400 MW64402 

MW64537 MW64540 XP32055 

AE 3007A-A-72-407 

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TABLE 7 

HPT2 P/N 23088818 

Serial Numbers that were Permanganate Cleaned and have a Reduced Cyclic Life Limit 

MW63177 

MW63262 

MW63277 

MW63286 

MW63331 

MW63345 

MW63383 

MW63396 

MW63410 

MW63418 

MW63442 

MW63453 

MW63463 

MW64143 

MW64167 

MW64193 

MW64206 

MW64219 

MW64235 

MW64252 

MW64273 

MW64317 

MW64368 

MW64408 

MW64460 

MW64476 

MW64491 

MW64528 

MW64644 

December 06, 2013 

Revision 1 

August 29, 2014 

MW63179 

MW63264 

MW63278 

MW63289 

MW63336 

MW63348 

MW63384 

MW63397 

MW63411 

MW63422 

MW63444 

MW63456 

MW63465 

MW64153 

MW64171 

MW64196 

MW64208 

MW64220 

MW64239 

MW64257 

MW64276 

MW64325 

MW64371 

MW64412 

MW64462 

MW64477 

MW64494 

MW64534 

MW65121 

P/N 23088818 

Affected Serial Numbers 

MW63185 MW63186 MW63205 MW63206 

MW63266 MW63270 MW63273 MW63274 

MW63279 MW63280 MW63282 MW63283 

MW63290 MW63291 MW63302 MW63303 

MW63337 MW63340 MW63341 MW63342 

MW63349 MW63356 MW63358 MW63382 

MW63386 MW63389 MW63390 MW63393 

MW63398 MW63400 MW63401 MW63408 

MW63412 MW63413 MW63414 MW63415 

MW63425 MW63430 MW63432 MW63433 

MW63445 MW63446 MW63447 MW63448 

MW63457 MW63459 MW63461 MW63462 

MW64134 MW64136 MW64138 MW64141 

MW64159 MW64161 MW64164 MW64165 

MW64177 MW64179 MW64180 MW64192 

MW64197 MW64198 MW64204 MW64205 

MW64211 MW64212 MW64214 MW64218 

MW64221 MW64223 MW64225 MW64226 

MW64244 MW64245 MW64249 MW64251 

MW64258 MW64265 MW64267 MW64271 

MW64277 MW64301 MW64303 MW64314 

MW64350 MW64354 MW64366 MW64367 

MW64372 MW64381 MW64383 MW64394 

MW64418 MW64438 MW64441 MW64459 

MW64467 MW64471 MW64473 MW64474 

MW64481 MW64483 MW64484 MW64490 

MW64498 MW64502 MW64523 MW64525 

MW64541 MW64603 MW64630 MW64638 

AE 3007A-A-72-407 

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D. Approval 

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Rolls-Royce 

SERVICE BULLETIN 

Technical aspects are FAA approved. 

E. Manpower 

In Service - Not applicable 

Engine Removed - Not applicable 

F. Compliance 

Mandatory. This service bulletin is related to a pending FAA Airworthiness Directive (AD), which 

will mandate a life reduction for the affected components. 

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 

I (1) Advance Engineering Memorandum (AEM), CN500016456037 A. 

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

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

M. Other Publications Affected: 

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

N. Prerequisites - None 

0. Corequisites - None 

2. ACCOMPLISHMENT INSTRUCTIONS 

None 

3. MATERIAL INFORMATION 

A. Configuration Chart - Not applicable 

B. Consumable Materials - None 

C. Expendable Parts - None 

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December 06, 2013 

Revision 1 

AE 3007A-A-72-407 

August 29, 2014 

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