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 ofAE 3007A Service Bulletins SUBJECT: Service Bulletin AE 3007A-A-72-407, Engine
- 1stand 2nd-stage High Pressure Turbine Wheel Life Limit Decrease This lettertransmits Revision 1to the subject service bulletin. Replace the original issue with this Revision 1

. This is a complete revision. Revision 1changes the Planning Information section. Ifyou have complied with the previous issue ofthis bulletin, no additional work is required. Thefollowing list includesthe original issue date and all revisionstothis bulletin: Original issue Revision 1 December 6, 2013 August 29, 2014

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# ALERT SERVICE BULLETIN 

# [I Rolls-Royce

ENGINE - 1STAND 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-stageor 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-stageor 2nd-stage high pressure turbine wheel (23079946, 23088906, 23088684, 23084520, 23084781, 23088817 or23088818) with the affected Serial Numbers. (See TABLES) B. Reason Fluorescent Pentetrant Inspection results show pitting in the bore of Udimet-720 1stand 2nd-stage high pressureturbine (HPT) wheels. Investigation showsthatthe cleaning process of wheels during 2007thru 2010 can be the cause of pitting. Pitting in the bore ofthe HPT1 and HPT2 wheel can reduce the safe life ofthe component in service. A recent analysis ofthe HPT1 and HPT2 wheels coupled with cyclictesting resulted in a lower life thanthe current Chapter 5 life limit. A risk assessmentwas completed and requires a Chapter5 life reduction as well as a mandatory Eddy Current Inspection ofthe possibly affected HPT1 and HPT2 wheels when the engine goesto an Authorized Maintenance Centerfor service. C. Description The declared Engine Cycle Life Limit (ECLL) (Ref. 05-10-00, MM) forthe HPT1 and HPT2 wheelsthatwere permanganate cleaned has been reduced. Chapter5 ofthe maintenance manual will be revised to showthe ECLLchanges. It is mandatorythatthese parts be replaced upon expiration ofthe operating time. The operator must record both hours and cycles of engine use in the appropriate section ofthe life limited parts record ofthe engine logbook. NOTE: The ECLLfor life limited components located in the upper right corner ofthe 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 limitofa 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

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# I I ALERT

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## Rolls-Royce SERVICE BULLETIN

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

PART Declared Life Limits (FlightCycles) 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 numbersthatwere permanganate cleaned. SeeTABLE 1. NOTE 2: HPT1 wheel serial numbersthatwere permanganate cleaned. SeeTABLE 2. NOTE 3: HPT1 wheel serial numbersthatwere permanganate cleaned. SeeTABLE 3.
TABLE 1 HPT 1 P/N 23079946 Serial Numbersthatwere Permanganate Cleaned and have a Reduced Cyclic Life Limit P

/N 23079946 Affected Serial Numbers MW51830 

# I MW51853 

# I MW51864 

# I MW51869 

# I MW51878to 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 Revision 1 August 29, 2014
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# ALERT Rolls-Royce SERVICE BULLETIN TABLE 2 HPT1 P/N 23088906 Serial Numbersthatwere Permanganate Cleaned and have a Reduced Cyclic Life Limit P

/N 23088906 Affected Serial Numbers MW61743to 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 Numbersthatwere Permanganate Cleaned and have a Reduced Cyclic Life Limit

December06, 2013 Revision 1 August29, 2014 P/N 23088784 Affected Serial Numbers MW54511 to MW55109

AE 3007A-A-72-407

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# ALERT Rolls-Royce SERVICE BULLETIN

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

PART Declared Life Limits (FlightCycles) 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 numbersthatwere permanganate cleaned. See TABLE 4. NOTE 5: Certain HPT2 wheel serial numbersthatwere permanganate cleaned. See TABLE 5. NOTE 6: Certain HPT2 wheel serial numbersthatwere permanganate cleaned. See TABLE 6. NOTE 7: Certain HPT2 wheel serial numbersthatwere permanganate cleaned. See TABLE 7.
TABLE 4 HPT2 P/N 23084520 Serial Numbersthatwere Permanganate Cleaned and have a Reduced Cyclic Life Limit

MW51936 MW51954 MW51961 MW51989 MW56076

December 06, 2013 Revision 1 August29, 2014 P /N 23084520 Affected Serial Numbers All Serial Numbers with prefix XP MW50462to 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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# ALERT Rolls-Royce SERVICE BULLETIN TABLE 5 HPT2 P/N 23084781 Serial Numbersthatwere Permanganate Cleaned and have a Reduced Cyclic Life Limit

MW53652 MW56063 P /N 23084781 Affected Serial Numbers MW53627to MW63381*
*The following Serial Numbers are excluded MW53654 MW53655 MW53656 MW54422 MW56065 MW61055 MW61599 MW63360

TABLE 6 HPT2 P/N 23088817 MW56056 MW63370

Serial Numbersthatwere Permanganate Cleaned and have a Reduced Cyclic Life Limit

MW63263 MW63299 MW63355 MW63436 MW64127 MW64228 MW64313 MW64362 MW64407

December06, 2013 Revision 1 August29, 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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# ALERT Rolls-Royce SERVICE BULLETIN TABLE 7 HPT2 P/N 23088818 Serial Numbersthatwere 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 August29, 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 

# ALERT 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 FAAAirworthiness Directive (AD), which will mandate a life reduction forthe 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 forthe internal use of Rolls-Royce only. (2) AE 3007ASeries Maintenance Manual (MM), CSP34022. M. Other Publications Affected: (1) AE 3007ASeries 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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