United States Air Force - USAF (since 1947)

Crashed in unknown circumstances 20 miles southeast of Midland, killing all five crew members.

The seaplane left Albrook AFB in Panama City that day on a maritime patrol mission. Cruising along the Panamanian coast, the aircraft crashed in unknown circumstances few dozen km off Jaqué. All seven crew members were killed.

The crew was performing a flight from Sheppard AFB (Wichita Falls, Texas) to Long Beach with an intermediate stop in Williams AFB, Arizona. While flying over de Chino Hills in clouds, the twin engine aircraft hit the cables of a high-tension power line and crashed on the slope of the San Juan Hill, southwest of Chino. All occupants were killed, apparently five crew members.

The aircraft departed RAF Lakenheath at 0925LT on a training mission consisting of a climb to 25,000 feet, break up the formation then drop 16,500 pounds of high explosive bombs individually on the bombing target at Heligoland. During the initial climb, while at a height of 500 feet, the captain reported to ATC that all was OK on board. Shortly later, while climbing into clouds, the aircraft went out of control, dove into the ground and crashed in a huge explosion in a field located half a mile southeast of Isleham. The aircraft was totally destroyed by impact forces and several explosions caused by the bombs and the 6,000 gallons of fuel. All 12 crew members were killed.
Source:
http://www.islehaminformer.org.uk/Images/Informer201110.pdf

The ski-equipped C-47 attempted to depart from a 4200 feet long airstrip which was covered with five inches of snow. The crew had checked out the location to see if a C-54 could land there for resupply operations. During the night frost had accumulated on the aircraft. The windshield was cleared, but the wings and stabilizer were not. At a weight of 28850 pounds, 850 pounds over the allowable gross weight, the pilot tried to take off. After becoming airborne the right wing dipped. The pilot recovered, but the main gear then touched the ground. The wheels and skis then hit a river bank. The C-47 bounced and came down on the right wing, sliding to a stop in a tail high position. The wreckage was still on the same location by 2005.
More details about this crash on
www.oldwings.nl/content/c47_yic/c47.htm

The airplane left Bolling AFB (Washington) at 0855LT bound for Brookley AFB in Mobile. About two hours into the flight, while cruising in marginal weather conditions, the aircraft hit the slope of Mt Mitchell (6,684 feet high). The wreckage was found two days later and all nine occupants have been killed.

En route, the crew encountered poor weather conditions with thunderstorm activity. In low visibility, the airplane hit the slope of a mountain located four miles west of Raton. The aircraft was destroyed and all ten crew members were killed.
Crew:
Walter C. Williams,
Melvin R. Truman,
James L. Reidinger,
Martin L. Murray,
Floyd C. Melton Jr.,
Frank M. Kackstetter,
James R. Irby,
Carl A. Hill,
Arthur L. Gaudreault,
Melvin C. Brock.

The crew was returning to his base in McChord following a training sortie above the Pacific Ocean. En route, the pilot informed ATC that he was encountering engine problems when he lost control of the aircraft that crashed in a wooded area located on a hill some 5 miles northwest of McCleary. The aircraft was destroyed by impact forces and a post crash fire and all three crew members were killed.

Shortly after takeoff from runway 36 at Carswell AFB, while in initial climb, the aircraft suffered a technical failure, lost height and crashed into Lake Worth. Eight crew members were rescued while five others were killed. The aircraft sank and was lost. The crew was performing a local training sortie for the 9th BS.

On approach to Kaktovik Airfield (Barter Island), while on a supply mission from Fort Wainwright-Ladd Field, the aircraft went out of control and crashed in flames. All five crew members were killed.