Accident Details
During an attempted takeoff from a hospital following a cancelled medical evacuation flight, a helicopter contacted power lines and the terrain. The hospital is situated in a box canyon surrounded by high terrain and power lines. The pilot was aware of the power line that crossed the proposed flight path.
Sequence of Events
According to a passenger statement made after the accident, the pilot hovered back to the end of the landing area to initiate the takeoff. During the climbout, the helicopter struck unmarked power lines and subsequently descended to ground impact.
Weather Conditions
Witnesses described the weather as cold and clear with calm ground winds near the hospital. They also stated that the night was bright because of a full moon.
Investigation
The accident investigation focuses on the circumstances surrounding the helicopter's contact with unmarked power lines during the takeoff from the hospital in a box canyon. No probable cause has been stated by the investigation source.