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Airworthiness directives › 2010-13-09

AD 2010-13-09 Airworthiness Directives; CFM International, S.A. CFM56-5, -5B, and -7B Series Turbofan Engines

2010-07-26
2010-06-21
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Engine
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Applicability*9

This AD applies to: (1) CFM International CFM56-5, -5B, and -7B series turbofan engines with stage 3 low-pressure turbine (LPT) disks part number (P/N) 336-002-006-0, installed with the following serial numbers (S/Ns), DE255844, DE256388, DE256622, DE256623, DE256625, DE256627, DE256628, DE256631, and DE256637. (2) CFM International, S.A. has stated that none of these affected disk S/Ns were originally installed on any CFM56-5 turbofan engine, however, that disk P/N is certified for use on CFM56-5 engines. (3) The -5 and -5B series engines are installed on, but not limited to, Airbus A318, A319, A320, and A321 airplanes, and the -7B series engines are installed on, but not limited to, Boeing 737 series airplanes.

Compliance

You are responsible for having the actions required by this AD performed within the compliance time specified unless the actions have already been done. Removal of Affected Stage 3 LPT Disks From Service (f) Before accumulating 9,500 cycles-since-new, remove stage 3 LPT disks from service. (g) After the effective date of this AD, do not reinstall any stage 3 LPT disk removed from service per paragraph (f) of this AD into any engine. Alternative Methods of

Unsafe condition

This AD results from the discovery of a material nonconformity requiring removal of the disk before the certified disk life of certain stage 3 LPT disks. We are issuing this AD to prevent uncontained failure of the stage 3 LPT disk 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