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Airworthiness directives › 2003-22-03

AD 2003-22-03 Airworthiness Directives; Rolls-Royce plc Trent 768-60 and Trent 772-60 Turbofan Engines

2003-11-14
2003-10-30
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Engine
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Applicability*9

This AD applies to Rolls-Royce plc (RR) RB211 Trent 768-60 turbofan engines with serial numbers (SNs) before SN 41056 and RB211 Trent 772-60 turbofan engines with SNs before SN 41056. These engines are installed on, but not limited to, Airbus A330 series airplanes.

Compliance

You are responsible for having the actions required by this AD performed within 15 months after the effective date of this AD, unless the actions have already been done. Rework of Affected Components (f) Rework the LP turbine nozzle vane case, part numbers (P/Ns) FK19488 and FK22687. Use Accomplishment Instruction paragraph 3.B. of RR Mandatory Service Bulletin (MSB) No. RB.211-72-C224, Revision 4, dated April 12, 2002. (g) Rework the LP turbine bearing support exhaust case, P/N FK22791. Use Accomplishment Instruction paragraph 3.C. of RR MSB No. RB.211-72-C224, Revision 4, dated April 12, 2002. (h) Rework the support arm bracket assembly, P/N FK29121. Use Accomplishment Instruction paragraph 3.D. of RR MSB No. RB.211-72-C224, Revision 4, dated April 12, 2002. Conditions for Installation (i) Reworked components identified in paragraphs (f), (g), and (h) of this AD must be installed as a complete set only. (j) Information on interchangeability of parts can be found in section 1.M. of RR MSB RB.211-72-C224, Revision 4, dated April 12, 2002. (k) After the effective date of this AD, do not install any modules marked M08821AA, M08821AB, or core engines TRENT121AA, or TRENT122AA into any engine. Alternative Methods of

Unsafe condition

This AD is prompted by a report of a low pressure (LP) stage 4 blade failure at the blade shank, resulting in severe radial distortion of the rear flange of the LP turbine case and failure of a number of attaching bolts, resulting in enough flange separation to allow the release of high energy debris. We are issuing this AD to prevent possible uncontained LP turbine case failure and damage to the airplane.

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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1