What happened
During a mission transporting 6.7 tons of various military equipment for the US Air Force, an aircraft traveling from Vang Vieng toward Long Tieng crashed into mountainous terrain. The flight was being conducted under marginal weather conditions at the time of the accident.
While navigating the route, the aircraft impacted a mountain peak at an elevation of 4,850 feet. Search efforts located the wreckage approximately 20 feet below the summit of the mountain. There were nine fatalities among the occupants of the aircraft, with no survivors reported.
Findings
Investigations into the accident determined that the crew did not maintain a sufficient altitude to clear the terrain during the flight. The primary factor in the crash was controlled flight into terrain.