Primary finding
Probable cause
The failure of the pilot to maintain clearance by allowing the helicopter to drift backwards, resulting in its tail rotor striking a hangar.
Investigator assessment
Analysis narrative
While hovering prior to takeoff and waiting for company traffic to pass clear, the helicopter inadvertently drifted backward striking a hangar with its tail rotor, which resulted in substantial damage to the aircraft.
Source record
Factual narrative
While hovering prior to takeoff and waiting for company traffic to pass clear, the helicopter inadvertently drifted backward striking a hangar with its tail rotor, which resulted in substantial damage to the aircraft.