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Tue, Jun 19, 2012

AD: Enstrom Helicopter Corporation Helicopters

AD NUMBER: 2012-11-05

PRODUCT: Model F-28C, F-28C-2, F-28F, 280C, 280F, 280FX, TH-28, 480, and 480B helicopters.
SUBJECT: Airworthiness Directive 2012-11-05
ACTION: Final rule; request for comments.

SUMMARY: The FAA is superseding an existing airworthiness directive (AD) for the products listed above to add another trim relay to the applicability and to revise the modification instructions.

This AD is prompted by the discovery that another part-numbered trim relay, inadvertently omitted from the current AD, may contain the same unsafe condition. These actions are intended to prevent failure of the cyclic trim system and subsequent loss of control of the helicopter.

DATES: This AD becomes effective July 3, 2012. The FAA must receive comments on this AD by August 17, 2012.

FMI: AD

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