Primary finding
Probable cause
The pilot’s inadequate visual lookout while flying at a low level over a river, which resulted in a wire strike.
Investigator assessment
Analysis narrative
The pilot was flying the helicopter following a river shoreline about 400 ft above ground level. He was scanning the horizon when he saw a “flash” and felt the helicopter shudder. He assessed the controllability of the helicopter and noted no anomalies, therefore, he continued the flight to a nearby airport. After landing, during the post flight examination of the helicopter, he found substantial damage to the vertical stabilizer of the helicopter. Furthermore, there were wire strike marks on the main rotor blade consistent with a wire strike. The operator reported no preimpact mechanical malfunctions or failures with the helicopter that would have precluded normal operation.