While returning from a supply mission, the aircraft exploded in midair and crashed into the sea some 24 km off Đồng Hới. All six crew members were killed. Crew: 1st Lt. Albert Michael Prevost, Maj Richard Andrew Alm, G/Sgt Galen Francis Humphrey, Sgt Peter George Vlahakos, S/Sgt Donald Leroy Coates, S/Sgt Russell Burr Luker.
Probable cause (official findings): The exact cause of the accident could not be determined with certainty. It is possible the aircraft may have been shot down by enemy fire but this was not proven. A possible technical failure may occur in flight, causing the aircraft to explode.