United States Air Force - USAF (since 1947)

On final approach to Tiên Phước, the airplane was hit by a mortal shell. Out of control, it dove into the ground and crashed few km short of runway threshold. The copilot survived while both other occupants were killed.
Crew:
1st Lt David Bicknel Bowling, †
1st Lt R. J. Patterson,
T/Sgt E. J. Welch. †

The aircraft was part of a formation of four Boeing KC-135A-BN Stratotanker engaged in a refuelling mission over South China Sea. Shortly after takeoff from Ching Chuan Kang AFB in Taichung, while in initial climb, the airplane encountered difficulties to gain height then stalled and crashed into the sea few miles offshore. The aircraft was destroyed upon impact and all four crew members were killed.
Crew:
Maj Gene Thomas Wright, pilots +3.

On final approach to Gia Nghĩa, the airplane struck the ground and crashed in a field located few dozen yards short of runway threshold. It broke in two and caught fire. A crew member was killed while four others were injured.

On final approach to Tainan Airport, the airplane went out of control and crashed few km short of runway. All eight crew members were killed.

While landing at Bu Dop, the C-130 had a recoilless rifle round explode near its right wing. It taxied to the cargo pad and unloaded its cargo of 105 artillery ammunition. It then taxied to the end of the runway and the aircraft attempted to takeoff with three engines. The right outboard engine was feathered. It reached an altitude of about 300 ft when the right inboard engine seized pulling the aircraft into the antitank mine field where it struck an antitank mine which blew the aircraft in half at the landing gear. The front portion of the aircraft slid just barely into the camp through the anti personnel minefield. Reportedly there were four fatalities on the ground: Cambodian strike force members of the 5th Special Forces III Mobile Strike Force.
Source: ASN

The aircraft departed Ubon Ratchathani Airport on an orbital control flight at 9,000 feet. En route, the airplane was hit by several rounds of 37 mm flak and burst into flames. Out of control, it dove into the ground and crashed in a mountainous and isolated area. SAR operations were abandoned after few weeks as no trace of the aircraft nor the crew was found. The remains of the crew were returned from Laos in November 1993 and positively identified in October 1995.
Crew:
Cpt Earl Carlyle Brown,
1st Lt Peter Richard Matthes,
Maj Michael Dimitri Belamonti,
Cpt Richard Owen Ganley,
S/Sgt Charles Richard Fellenz,
S/Sgt Larry Irwin Grewell,
S/Sgt Donald Lee Wright,
Sgt Rexford John DeWispelaere.

The crew departed Eglin AFB on a local test flight on board this aircraft that was fitted with radiological test equipment for Project "Have Doughnut". Following an uneventful mission, the crew was approaching the airbase when he encountered foggy conditions. On final, the airplane crashed into the Choctawhatchee, about 2,5 miles short of runway threshold. Both crew members were rescued while the aircraft sank.

On touchdown, the aircraft went out of control, veered off runway and came to rest in flames. All six crew members escaped uninjured while the aircraft was destroyed by a post crash fire.

The four engine aircraft disappeared in unknown circumstances while completing a flight from Elmendorf AFB to King Salmon. SAR operations were initiated but eventually abandoned after few weeks as no trace of the aircraft nor the four crew members was found. The wreckage was located in 1972 in an isolated area.

Shortly after takeoff from Saigon-Tan Son Nhat Airport, while climbing, an engine failed and caught fire. The pilot lost control of the airplane that crashed in a huge explosion. Six of the 10 occupants were killed. At the time of the accident, the airplane was carrying a load of ammunitions.
Those killed were:
Lt Col Bernard Richard Knapic,
Maj Moses Lopes Alves,
Maj Jerome James Rice,
Cpt John Hooper V. Hathaway,
S/Sgt Ellsworth Smith Bradford,
S/Sgt Abraham Lincoln Moore.