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Fri, Apr 13, 2012

AD: Sikorsky Aircraft Corporation Helicopters

AD NUMBER: 2012-06-24

PRODUCT: Sikorsky Aircraft Corporation (Sikorsky) Model S-92A helicopters
SUBJECT: Airworthiness Directive 2012-06-24
ACTION: Final Rule

SUMMARY: This AD was prompted by the discovery of tail rotor blade assemblies (blades) manufactured with mislocated aluminum wire mesh, leaving portions of the graphite torque tube (spar) region unprotected from a lightning strike. The actions are intended to detect mislocated blade wire mesh and to prevent spar delamination, loss of the blade tip cap during a lightning strike, blade imbalance, loss of a blade, and subsequent loss of control of the helicopter.

DATES: This AD is effective May 15, 2012.

FMI: AD

 


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