Flight Details
The helicopter was on a flight to a radio transmitter site situated at approximately the 7,000-foot level in mountainous terrain. During arrival at the helipad, the pilot observed several vehicles parked on the landing surface. While in a hover, he maneuvered the helicopter to an adjacent road and began inspecting it for suitability as a landing area.
Engine Power Fade
After determining that the road was unsatisfactory, the pilot applied power and collective to initiate a left climbing turn. According to all statements, the engine's response to the power demand was a gradual power fade until it quit. Subsequently, the aircraft landed hard in a bush-covered area and was damaged.
Post-Accident Examination
The engine was examined and operationally tested, but no abnormalities were noted. The density altitude was calculated to be between approximately 7,800 and 8,650 feet. According to the flight manual, at the estimated weight, the helicopter's hovering ceiling was 13,000 feet in ground effect and 8,300 feet out of ground effect.