ALERT

July 25, 2013

Page 1 of 2

AE 2100P--A--72--019

E COPYRIGHT 2013 Rolls--Royce Corporation (unpublished)

ENGINE -- 4TH--STAGE TURBINE WHEELS WITH POSSIBLE BORE

PITTING -- LIFE LIMIT DECREASE

1. PLANNING INFORMATION

A. Effectivity

(1) Engines

AE 2100P engines with 4th--stage turbine wheel (23083536).

(2) Spares -- Not affected

B. Reason

Fluorescent penetrant inspection results show higher than normal pitting in the bore of the

turbine wheel. Investigation shows that the cleaning process of wheels during 2007 thru 2010

can be the cause of pitting. As a result, the declared Engine Cycle Life Limit (ECLL) of the

affected wheels will decrease.

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

mandate a decreased life limit for the 1st--stage gas--generator turbine wheels with possible

pitting.

C. Description

The declared ECLL for the 4th--stage turbine wheels (23083536) (Ref. TASK

05--10--05--800--801, EMM) has been decreased. Chapter 5 of the Engine Maintenance Manual

will be revised to show the declared ECLL change.

This service bulletin releases a part that is life--limited. It is mandatory that this part be replaced

when the operating time 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 declared ECLL 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 Engine

Maintenance Manual for current ECLL information.

You must include this mandatory limit in your own approved maintenance schedule, if

applicable.

TABLE 1 -- 4th--stage Turbine Wheel Life Limits

PART

NUMBER

PART NAME OLD

ACCUMULATED

CYCLE LIFE LIMIT

NEW

ACCUMULATED

CYCLE LIFE LIMIT

23083536 Wheel Assy, Turbine --

Stage 4

20,000 20,000

(16,900 NOTE 1)

NOTE: (1) Accumulated Cycle Life Limit only for 4th--stage turbine wheels with possible

bore pitting. See TABLE 2.

SERVICE

BULLETIN

EXPORT CONTROLLED
Rolls--Royce

SERVICE BULLETIN

EXPORT CONTROLLED

ALERT

July 25, 2013

Page 2 of 2

AE 2100P--A--72--019

E COPYRIGHT 2013 Rolls--Royce Corporation (unpublished)

TABLE 2 -- 4th--stage Turbine Wheels (23083536) with Possible Bore Pitting

AFFECTED SERIAL NUMBER

MW51653

MW52027 thru MW52324

MW52326 thru MW52353

MW52355 thru MW52545

MW52548 thru MW52672

MW52675 thru MW52684

MW52686 thru MW52694

MW52696

MW52697

MW52699

MW52700

MW52703 thru MW52711

MW52713 thru MW52717

MW52719

MW52737

MW52750 thru MW52754

MW52767

MW52768

MW52784

MW52785

MW52788

MW52825 thru MW55703

MW55705

MW55707 thru MW55715

MW55717 thru MW55723

MW55725

MW55727

MW55729 thru MW55747

MW65205

D. Approval

Technical aspects are FAA approved.

E. Manpower

In Service -- Not applicable

Engine Removed -- Not applicable

F. Compliance

Mandatory.

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), CY500016456038.

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

(2) AE 2100P Engine Maintenance Manual (EMM), CSP31015.

M. Prerequisites -- None

N. 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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ROLLS-ROYCE