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Mon, Nov 19, 2012

AD: Sikorsky Aircraft Corporation Helicopters

AD NUMBER: 2012-22-09

PRODUCT: Sikorsky Aircraft Corporation (Sikorsky) Model S-92A helicopters.
SUBJECT: Airworthiness Directive 2012-22-09
ACTION: Final Rule

SUMMARY: This AD requires inspecting the tail rotor (T/R) pylon for a loose or missing fastener, a crack, damage, or corrosion and adding an internal doubler to the aft shear deck tunnel assembly. This AD was prompted by the discovery of cracks in T/R pylons.

The actions are intended to detect a loose or missing fastener, a crack, damage, or corrosion on the T/R pylon and, if present, to repair the T/R pylon and install a doubler on the aft shear deck tunnel assembly or to replace the T/R pylon and install a doubler on the aft shear deck tunnel assembly. The actions are intended to prevent failure of the T/R pylon or other T/R components, which could lead to the loss of control of the helicopter.

DATES: This AD is effective December 20, 2012.

FMI: AD

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