Accident Summary
The pilot performed a downwind takeoff in gusty wind conditions, with winds reported at 25 knots. The helicopter was carrying two passengers and was approximately 130 pounds below gross weight at the time of departure. Shortly after takeoff, the pilot reported a loss of engine power. The pilot then initiated an autorotation to manage the emergency descent. However, during the descent, the pilot was unable to maintain directional control of the aircraft.
As a result, the helicopter's tail rotor struck a moving vehicle. Subsequently, the helicopter collided with the terrain.
Examination Findings
Following the accident, the engine was examined and tested. It operated normally, and no mechanical malfunctions were identified. Further inspection revealed that a fuel nozzle had been installed in the aircraft's fuel system without a restrictor. To compensate for the missing restrictor, the fuel servo idle mixture had been set to a very lean setting. However, this condition was determined not to be a factor in the accident.
The investigation did not identify a specific cause for the reported loss of power.