Robinson Helicopter Company R44 N41407 accident near Chireno, Texas

Probable cause

The student pilot's selection of unsuitable terrain for landing, which resulted in the helicopter rolling over during landing, and substantial damage to the tail boom.

NTSB analysis

The student helicopter pilot reported that during a local flight he diverted his attention to the navigational equipment and removed his hand from the cyclic. He reported that he lost control of the helicopter and believed the helicopter became inverted. He further reported that he presumed that he had damaged the rotor system and elected to make a precautionary landing by entering an autorotation. During the landing, the left helicopter skid touched down on uneven terrain and the helicopter rolled over, which resulted in substantial damage to the tail boom.

The pilot reported there were no preimpact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.

The manufacturer provided a test flight video that showed what will occur when the Helicopter's cyclic is released in forward flight. Per the video, in forward flight, should the pilot release the cyclic, the helicopter will pitch up and roll left.

Text from the NTSB. Open the NTSB docket for GAA16CA297 for the full record.