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Fri, Dec 01, 2017

AD: CFM International S.A. Turbofan Engines

AD NUMBER: 2017-24-06

PRODUCT: Certain CFM International S.A. (CFM) LEAP-1A turbofan engines.

ACTION: Final Rule; request for comments

SUMMARY: This AD requires removal, inspection, rework, and reidentification of the high-pressure turbine (HPT) stage 2 disk, part number (P/N) 2466M52G03.

This AD was prompted by a quality escape at the manufacturer that resulted in cracks appearing during forging of the HPT stage 2 disks.

COST: The FAA estimates that this AD affects 7 engines installed on airplanes of U.S. registry. The cost of compliance is estimated to be $47,600 per aircraft for 560 work-hours at $85 per hour.

DATES: This AD is effective December 15, 2017. Comments must be received by January 16, 2018.

FMI: AD

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