Helicopter strikes power lines during unauthorized night test flight (N3067G)

What happened

The noncertificated pilot reported that he had previously repaired the helicopter before proceeding to conduct a local test flight. He stated that he took off in dark conditions after consuming several beers. Shortly after takeoff, while at low altitude near the airport, the pilot chose to turn off the landing light. The helicopter subsequently struck power lines and descended to impact the ground.

The investigation

The investigation revealed that the pilot held a student pilot certificate which had expired at the time of the accident. No further mechanical examination details were provided in the source narrative.

Findings

Contributing factors included the pilot's decision to fly in darkness without adequate lighting and his consumption of alcohol prior to flight. The pilot was operating with an expired certificate.