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Tue, Jun 19, 2018

AD: Pratt & Whitney Division Turbofan Engines

AD NUMBER: 2018-13-02

PRODUCT: All Pratt & Whitney Division (PW) PW4052, PW4056, PW4060, PW4062, PW4062A, PW4152, PW4156A, PW4158, PW4460, and PW4462 turbofan engine models, including engines identified with suffixes -1C, -1E, -3, -3A, or -3B.

ACTION: Final Rule.

SUMMARY: This AD was prompted by the discovery of multiple cracked 4th stage low-pressure turbine (LPT) air seals in the fleet.

This AD requires removal from service of certain 4th stage LPT air seals.

DATES: This AD is effective July 20, 2018.

COST: The FAA estimates that this AD affects 991 engines installed on aircraft of U.S. registry. The cost of compliance is estimated to be $13,800 per engine for part and labor.

FMI: AD

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