Primary finding
Probable cause
The pilot’s failure to maintain control of the helicopter while attempting to land on a trailer in gusting wind conditions, which resulted in a dynamic rollover.
Investigator assessment
Analysis narrative
The pilot reported that he was attempting to land the helicopter on a trailer when a gust of wind pushed the helicopter and the left skid got caught under the side of the trailer. The helicopter entered a dynamic rollover and impacted the ground resulting in substantial damage to the fuselage, main rotor blades, tailboom and the tail rotor. The wind speed reported at an airport located about 14 nautical miles from the accident site was 11 knots with gusts up to 20 knots.