United States Air Force - USAF (since 1947)

Shortly after takeoff from Tây Ninh Airstrip, while in initiale climb, the pilot encountered technical problems with the flaps and decided to perform an emergency landing in a rice paddy field. All five crew members were uninjured while the aircraft was damaged beyond repair.

Shortly after takeoff from runway 07 at Wiesbaden-Erbenheim AFB, while climbing, one of the engine lost power. The airplane lost height and crash landed in a field located in Breckenheim, about 6 km northeast of the airfield. All four crew members escaped uninjured while the aircraft was partially destroyed by fire.

While on defoliation mission, the airplane was shot down by enemy fire and crashed 8 km southwest of Xepon. All five crew members were killed.
Crew:
Cpt Roy Robert Kubley,
Maj Lloyd Francis Walker,
Cpt Harvey Mulhauser,
Lt Howard Leroy Barden,
A1C Ronald Kazuo Miyazaki.

While descending to Fairchild AFB on a flight from Hickam Field, Hawaii, the airplane was too low and the struck the slope of Mt Shadow (4,337 feet high) located 40 miles northwest of Fairchild AFB. The airplane struck trees and disintegrated on impact, killing all nine crew members.

The crew departed Đà Nẵng Airport on a target reconnaissance, carrying a crew of seven. While cruising by night at low altitude and low speed, the airplane was hit by enemy fire and crashed near Đức Phổ. All seven crew members were killed.
Crew:
Cpt Charles William Robertson,
1st Lt James Donald Goodman,
Maj Joseph E. Wilkinson,
S/Sgt Raymond Medina,
S/Sgt Cecil Truman Thompson,
A1C Dana Richard Kelley,
A2C Lonny Leroy Mitzel.

Crashed in unknown circumstances in South Vietnam, injuring all five crew members.

Few minutes after takeoff from Kabinburi Airstrip, the engine failed. The aircraft stalled and crashed in a wooded area and was destroyed. Both pilots were injured.

Shortly after takeoff from Saigon-Tan Son Nhat Airport, while climbing, the crew informed ground about the failure of the left engine and elected to return for a safe landing. On final approach, as he was unable to lower the landing gear, the captain decided to make a go-around and completed a circuit. While on a second approach, the airplane went out of control and crashed in a rice paddy field located few km from the runway threshold. All 25 passengers and 6 crew members were killed. The left propeller was feathered at the time of impact.
Crew:
Cpt Karl David Sobolik,
Lt Col William Affley Lynch,
Cpt Carroll Gene Hogeman,
Cpt John Richard Humphrey,
Cpt Joe H. Trickey,
S/Sgt Alan Ralph Steffen.

The aircraft was engaged in a paradropping mission, carrying 35 paratroopers and two pilots. Shortly after takeoff from Dầu Tiếng Airport, while in initial climb, the airplane was hit by enemy fire. Hydraulic lines were ruptured and the fluid caught fire. The crew was able to make a circuit to return for an emergency belly landing. The airplane belly landed and came to rest onto runway. All 37 occupants were slightly injured and the aircraft was damaged beyond repair.

The crew departed Barksdale AFB, Louisiana, at 1500LT on a training flight to Kenneth Ingalls Sawyer AFB (K. I. Sawyer AFB), Wisconsin. The goal of the mission was to test the performances of a new ground reconnaissance radar. While cruising by night at low altitude, the airplane struck trees, stalled and crashed in a dense wooded area located south of Stone Lake. The aircraft was totally destroyed and all nine crew members were killed.
Crew:
Cpt Curtis E. Robertson, pilot,
1st Lt Darrick R. Negron, copilot,
Lt Col Jack Atherton, pilot instructor,
Cpt Edward E. Kamph, radio navigator,
1st Lt Jerome P. Calligari, navigator,
Maj James H. Crook, navigator instructor,
Cpt Michael J. Dunlap, early warning operator,
A1C Gerald D. Turney, air gunner,
M/Sgt Lonnie Woodard, flight engineer.