47-51-14
final ruleAirworthiness Directives; Sikorsky Models YR-6A, R-6A, and HOS-1 Helicopters
Unsafe Condition: Pinion and Ring Gear Inspection
Category: aircraft
Why matched: Airworthiness Directives; Sikorsky Models YR-6A, R-6A, and HOS-1 Helicopters