United States Air Force - USAF (since 1947)

According to the testimony of John R. Young, there was a sudden loss of power. The aircraft came down fast and hard. The captain tried to belly land when the plane broke up below cockpit and became a giant plow. Two occupants (pilot and taskmaster) were fatally injured and other occupants were injured, some seriously. There were few troops and locals on board at the time of the accident.

The airplane was operating over the Ho Chi Minh Trail in southern Laos when its port engine was damaged by AAA near Ban Namchalo. The pilot aborted the mission and carefully made his way back to Nakhon Phanom where he made an emergency landing. All five crew members were uninjured but the aircraft was so badly damaged that it had to be scrapped.
Source: Chris Hobson.

The crew was involved in a radio intelligence mission over Laos. While cruising at an altitude of 9,500 feet, the airplane was hit by enemy fire and the left engine caught fire. The crew was able to leave the combat zone and to return to South Vietnam before completing an emergency landing at the special forces camp of Ben Het. The aircraft crash landed and was destroyed while all six crew members escaped uninjured.

The aircraft was completing a flight from Huế to Khe Sanh, carrying troops and spare parts. On approach, the crew was forced to make a go-around because of the presence of a light aircraft on runway. Shortly later, the airplane was hit by ground fire. The left engine caught fire and the airplane crashed in a dense wooded area located 2 km from the airfield. All 50 occupants were killed, 5 crew members, 44 soldiers and one civilian photographer.
Crew:
Lt Col Frederick Jordan Hampton,
1st Lt Ellis Eugene Helgeson,
Sgt Jeffrey Francis Conlin,
S/Sgt William Frank Anselmo,
S/Sgt Noel Luis Rios.

Suffered a ground accident at Hickam Field AFB. There were no casualties while the aircraft was destroyed.

It is understood that a in-flight fire occurred on board following an electrical short-circuit in the cockpit. The aircraft crash landed at Cam Ranh Bay Airport and came to rest in flames. All six crew members were evacuated safely while the aircraft was destroyed.

The crew was approaching Huế-Phú Bài Airport by night and rainy weather. For unknown reason, the aircraft crashed on landing and came to rest in flames. While all five crew members were injured, all six passengers were killed.

After liftoff from Khe Sanh Airstrip, while in initial climb, the airplane was struck by a mortal shell. The captain decided to land immediately and after touchdown, the airplane went out of control, veered off runway and came to rest in flames. All 10 occupants escaped uninjured while the aircraft was destroyed.

The crew departed Carswell AFB on a routine training mission over the Gulf of Mexico. En route, the airplane went out of control and crashed into the sea few dozen miles off Matagorda Island. Few debris were found some days later but no trace of the eight crew members who were probably killed upon impact.
Crew:
Maj Frank M. Salavarria, pilot,
Lt William T. Causey, copilot,
Cpt Charles W. Roberts, radio navigator,
M/Sgt Kermit C. Casey, air gunner,
Lt Michael L. Carroll, navigator,
Cpt John T. Pantilla, EWO,
Cpt Thomas D. Childs,
Maj Phillip F. Strine.

After takeoff from Sông Bé Airstrip, while in initial climb, the airplane was hit by enemy fire. One of the wing caught fire and the captain decided to return for a safe landing when the aircraft was struck by other firearms. Eventually, the pilot was able to land back at Sông Bé. While all 10 occupants escaped uninjured, the aircraft was totally destroyed by fire.