What happened
The pilot initially departed on a radio traffic watch flight after requesting and receiving a special VFR clearance to fly into adverse weather conditions. Approximately 90 minutes after the initial departure, the pilot requested a second special VFR clearance to return to the departure airport. During this period, the pilot reported no issues with the flight.
At dusk, radar data showed the helicopter was traveling at a speed between 50 and 60 knots and was maintaining an altitude of approximately 400 feet above the ground just before radar contact was lost. The aircraft struck power transmission lines located 194 feet above a river and subsequently descended into the water. At the time of the accident, the area was experiencing low visibility, obscured skies, and low cloud ceilings.
The investigation
An examination of the wreckage was conducted, which did not reveal any mechanical malfunctions contributing to the accident.