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Wed, Dec 25, 2019

AD: The Boeing Company Airplanes

AD NUMBER: 2019-24-17

PRODUCT: All Boeing Model MD-90-30 airplanes.

ACTION: Final rule

SUMMARY: This AD was prompted by reports indicating that certain center wing stringers and skins are potentially susceptible to cracking.

This AD requires repetitive eddy current, low frequency (ETLF) inspections of the left and right side fastener holes for any crack; repetitive eddy current, high frequency (ETHF) inspections of the lower skin for any crack; and repair if any crack is found.

DATES: This AD is effective January 24, 2020.

COST: The FAA estimates that this AD affects 65 airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

Inspection 30 work-hours × $85 per hour = $2,550 per inspection cycle.

FMI: AD

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