Textron/Cessna 400 series Spar Eddy Current inspection

FAA AD2018-03-03

SUMMARY: We are adopting a new airworthiness directive (AD) for certain Textron Aviation Inc. Models 401, 401A, 401B, 402, 402A, 402B, 402C, 411, 411A, 414, 414A 421, 421A, 421B, 421C, and 425 airplanes. 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. We are issuing this AD to address the unsafe condition on these products.

DATES: This AD is effective February 28, 2018.

The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of February 28, 2018.

We must receive comments on this AD by March 30, 2018.

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