Primary finding
Probable cause
The pilot’s failure to maintain lateral control of the helicopter during takeoff, which resulted in a dynamic rollover.
Investigator assessment
Analysis narrative
The non-certificated pilot of the helicopter reported that the purpose of the flight was to practice takeoff, hover, and landing maneuvers from his private grass field. During takeoff, he increased the engine power and inadvertently applied right cyclic concurrently as he raised the collective. Subsequently, the helicopter’s right skid dug into the ground, resulting in a dynamic rollover. The helicopter sustained substantial damage to its main rotor blades and tail boom structure. The pilot reported that there were no preaccident malfunctions or failures with the helicopter that would have precluded normal operation.