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AD: Textron Aviation Inc. Airplanes

AD NUMBER: 2018-03-03

PRODUCT: Textron Aviation Inc. Models 401, 401A, 401B, 402, 402A, 402B, 402C, 411, 411A, 414, 414A 421, 421A, 421B, 421C, and 425 airplanes.

ACTION: Final Rule.

SUMMARY: This AD requires repetitively inspecting the left and the right forward lower carry through spar cap for cracks and replacing the carry through spar if cracks are found.

This AD was prompted by a report of a fully cracked lower forward carry through spar cap found on an affected airplane.

DATES: This AD is effective February 28, 2018.

COST: The FAA estimates that this AD affects 2,147 airplanes of U.S. registry. The costs of compliance are estimated as follows:
Inspect the left and the right forward lower carry through spar cap for cracks (without inspection access panels) - $1,020 per aircraft per inspection cycle.
Replace carry through spar - $73,000 per aircraft including parts and labor.

FMI: AD

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