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Thu, Apr 02, 2009

AD: General Electric

AD NUMBER: 2009-07-10
MANUFACTURER: General Electric
SUBJECT: Airworthiness Directive 2009-07-10
SUMMARY: The FAA is adopting a new airworthiness directive (AD) for General Electric Company (GE) CF6-80A series turbofan engines with a high-pressure turbine rotor (HPTR) stage 1 disk, part number(P/N) 9367M45G06, installed. This AD requires removing any HPTR stage 1 disk, P/N9367M45G06, before exceeding 2,075 cycles-since-new (CSN). This AD results from an error by GE that incorrectly cited a cyclic life of 12,600 CSN for the HPTR stage 1 disk, P/N 9367M45G06.We are issuing this AD to prevent the HPTR stage 1 disk from exceeding its part life, which could cause fatigue cracks to start and grow. These cracks could result in a possible uncontained disk failure and damage to the airplane.

FMI: www.faa.gov/regulations_policies/airworthiness_directives/

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