Phan Rang

En route from Đà Nẵng to Saigon, while cruising at an altitude of 26,000 feet, three guys entered the cockpit and ordered the pilot to divert to Hanoi. The captain tried to explain that this was not possible and that he should perform an intermediate stop at Phan Rang Airport. Shortly later, two hand grenades exploded in the front part of the cabin, causing major damages to the aircraft control systems. While approaching Phan Rang Airport, at a height of 1,000 feet, the airplane entered a nose-down attitude then crashed in a huge explosion in a rice paddy field located few km from the runway threshold. The aircraft disintegrated on impact and all 75 occupants were killed.

While completing a spraying mission against malarial mosquitoes, the airplane crashed in unknown circumstances near Phan Rang. All five crew members were killed.
Crew:
1st Lt Charles Milton Deas,
1st Lt Richard William O'Keefe,
Lt Col Daniel Harrison Tate,
M/Sgt Donald Louis Dunn,
T/Sgt Clyde Wendell Hanson.

Ten minutes after his departure from Phan Rang Air Base, the pilot started the descent to Cam Ranh Bay via a steep valley (3 km wide and 15 km long) at an altitude of 2,700 feet via heading 30°. Shortly later, ATC instructed the crew to change heading to 100° when contact was lost. The airplane struck trees with its both wings, stalled and crashed in flames in a dense wooded area located few km from Cam Ranh Bay Airport. Rescuers arrived on the scene five days later and found two men still alive while 42 other occupants were killed. At the time of the accident, the visibility was nil due to low clouds.
Crew:
Cpt Cecil Gerald Moyer,
Cpt Norbert Albert Podhajsky,
1st Lt James Francis Saxby,
S/Sgt Grayson Henry Newberry,
S/Sgt Harry Allen Watson.

While approaching Cam Ranh Bay Airport on a flight from Phan Rang, an engine failed. The crew lost control of the airplane that crashed few km from the airfield. A crew member survived while three others were killed.
Crew:
Maj Grant Reed Waugh, †
Cpt Dwaine Elbyrne Mattox, †
T/Sgt Bernard Francis Morrill, †
+ one crew, name unknown.

On touchdown at Phan Rang Airport, the nose gear collapsed. The airplane slid for dozen yards, overran and came to rest. All five crew members were uninjured while the aircraft was damaged beyond repair.

While conducting a night supply mission, the airplane was hit by enemy fire and crashed in flames 8 km south of Phan Rang Airbase. All eight crew members were killed.
Crew:
Lt Col Karl Merritt Waldron,
Cpt Edward Beeding Quill,
Cpt Thomas Joseph Margle,
S/Sgt Warren Mitchell Dixon,
S/Sgt Robert Kiyoshi Kawamura,
S/Sgt Roger Gail Lee,
Sgt James Harvey Bennett,
Sgt Brent Tosh.

As the aircraft was about to take off for its return flight to Phan Rang, the pilot saw a huge thunderstorm directly in its path and decided to abort the flight. He was observed to taxi along the runway to return to the parking area and had covered about 2,000 feet when the tower warned him to clear the runway immediately. However, before the Provider could turn off the runway it was hit by a Thunderchief as it landed in poor visibility. The F-105's starboard wing sliced through the left side of the C-123's fuselage and the jet's fuselage tore off both the Provider's engines from its port wing. The Thunderchief pilot died in the collision and the burning aircraft tumbled down the runway for another 5,000 feet. All the C-123 crew escaped with burns, although one of them died from his injuries few days later.
Source: Chris Hobson

Crashed in unknown circumstances somewhere in Vietnam while completing a flight from Phan Rang to Pleiku. All 16 occupants were killed.

Crash in unknown circumstances near Phan Rang while completing an administrative service from Cam Ranh Bay to Saigon. All 25 occupants were killed.
Crew:
Lt Cdr Leo Claude Hester,
Lt Cdr Robert George Kerr,
AN Francis Raymond Ferron,
ADR2 Cecil Leroy Chapman.

The aircraft went missing during a night cross country courier flight between Saigon and Phan Rang. The wreckage was found on 23 December and the indications were that the aircraft had been shot down by ground fire. All nine crew members were killed.
Crew:
Maj Robert William Abbot,
Maj Robert Lloyd Abernathy,
1st Lt Francis Richard Buckley,
M/Sgt Joseph Anthony Cestaric,
T/Sgt John Monroe Chappell,
T/Sgt Thomas Newton Sloan,
S/Sgt Ralph Leon Hinson,
A1C Claude Wesley Matthews,
A1C Johnson Ashley Meade.