Primary finding
Probable cause
The pilot's inadequate visual lookout, which resulted in an in flight collision with utility wires during takeoff, and a subsequent impact with terrain.
Investigator assessment
Analysis narrative
The pilot was flying pipeline patrol in a helicopter, while the copilot monitored the pipeline on a laptop computer. During the patrol, the laptop computer malfunctioned, and the pilot landed in a field while the copilot attempted to repair the laptop computer. After the laptop computer was repaired, the pilot hover taxied to the end of the field, and began a takeoff run. During the takeoff run, at an altitude of 40 feet and airspeed of 30 to 40 knots, the helicopter struck utility wires. The helicopter subsequently impacted a field and came to rest on its right side. The pilot did not report any preimpact mechanical malfunctions with the helicopter.
Source record
Factual narrative
The pilot of an Alouette II helicopter stated that he was flying a pipeline patrol, while the copilot monitored the pipeline on a laptop computer. During the patrol, the laptop computer malfunctioned, and the pilot landed in a field while the copilot attempted to repair the laptop computer. After the laptop computer was repaired, the pilot hover taxied to the end of the field, and began a takeoff run. During the takeoff run, at an altitude of 40 feet and airspeed of 30 to 40 knots, the helicopter struck utility wires. The helicopter subsequently impacted a field and came to rest on its right side. During the impact, the helicopter sustained substantial damage. The pilot did not report any preimpact mechanical malfunctions with the helicopter.