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final rule

Airworthiness Directives; Sikorsky Models YR-6A, R-6A, and HOS-1 Helicopters

Unsafe Condition: Failure of the pinion and ring gears in the main gearbox due to improper installation of the power takeoff assembly.

Category: aircraft Compliance: At each removal and replacement of the power takeoff assembly.

Why matched: Airworthiness Directives; Sikorsky Models YR-6A, R-6A, and HOS-1 Helicopters