Airworthiness directives › 2007-24-04
AD 2007-24-04 Airworthiness Directives; CFM International, S.A. CFM56-5C4/1 Series Turbofan Engines
Applicability*9
This AD applies to CFM International, S.A. CFM56-5C4/1 series turbofan engines with low pressure turbine (LPT) conical support, part number (P/N) 337-002-407-0, installed. These engines are installed on, but not limited to, Airbus A340 series airplanes.
Compliance
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. (f) Remove LPT conical support, P/N 337-002-407-0, at or before accumulating 20,000 cycles-since-new (CSN) and replace with a serviceable part. (g) After the effective date of this AD, do not install any LPT conical support, P/N 337-002-407-0, with 20,000 or more CSN, into CFM56-5C4/1 series turbofan engines. Alternative Methods of
Unsafe condition
This AD results from CFM International, S.A. performing a life extension study of the LPT conical support, P/N 337-002-407-0. We are issuing this AD to prevent LPT conical supports from remaining in service beyond their certified cyclic life limit, which could result in an uncontained engine 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