Primary finding
Probable cause
The pilot’s failure to maintain clearance from power lines during approach.
Investigator assessment
Analysis narrative
The helicopter pilot reported that during an approach to an off-airport confined area, the skid struck the top of a power line that he did not see. Upon impact the helicopter began to nose over and spin as the pilot closed the engine throttle. The helicopter subsequently impacted the road adjacent to the intended landing point. The tail boom separated, and the main rotor system and airframe sustained substantial damage. The pilot reported that there were no preimpact mechanical failures or malfunctions that would have precluded normal operation.