Military

The flight was attempted in heavy snow falls. Shortly after takeoff from Griffiss AFB, while climbing, the aircraft went out of control and crashed. Two crew members were killed while three others were injured.

While descending to Ushuaia on a flight from Río Gallegos, the crew informed ground about his position vertical to Lake Fagnano. Few minutes later, while cruising at an altitude of 600 meters, the airplane hit the slope of the Mt Roncagly Ewn located near the Almirantazgo fjord, on the south part of Chile. SAR operations were conducted but eventually suspended few days later as no trace of the aircraft nor the crew was found. The wreckage was discovered by walkers 33 years later, in 1983, in an isolated area located west of Ushuaia.
Crew:
Cpt Bautista Faustino Mendioroz,
1st Lt Raúl Juan Zarzuela,
Lt Emilio Barrios,
Lt Marcos Carlos Modolo,
Lt José Enrique Marcuzzi,
Lt José Antonio Bianchi,
Sgt Adrián Enrique Heynen,
Sgt Adelmo Carmen Amoroso,
Sgt Hector Oscar Ibañez,
Maj Federico Nicolás Pacheco,
Maj Humberto Francisco Losardo.

After touchdown on a wet grassy airfield, the airplane swung, veered off runway and eventually collided with a tree. There were no casualties but the aircraft was written off.

The crew left RAF Scampton in the evening of March 14 on a liaison flight to RAF Valley in Anglesey. While approaching Anglesey from the east by night and in poor weather conditions, the aircraft hit the slope of the Mt Carnedd Llywelyn (1,064 meters high) located in the Carneddau Mountain Range, about 23,5 miles southeast of RAF Valley. The wreckage was found in the early morning and all six crew members were killed.
Crew (230th OCU):
S/L John T. Shore, pilot,
F/Lt Cyril A. Lindsey, navigator,
Eng Ronald A. Forsdyke, Flight Engineer,
Sig Harold Henry Charman, radio operator,
Gnr Godfrey L. Cundy, air gunner,
Gnr Robert H. Wood, air Gunner.

Crashed in unknown circumstances. Crew fate remains unknown.

After touchdown in Harrisburg-Olmsted AFB, the aircraft went out of control, veered off runway and came to rest in flames. There were no casualties but the aircraft was destroyed by fire.

Apparently, the crew encountered an unexpected situation and was forced to attempt an emergency landing in a prairie. After landing, the aircraft rolled for few dozen yards and eventually crashed in a farmhouse located 6 miles south of Charlotte. The aircraft was destroyed and the farmhouse was seriously damaged. The crew escaped uninjured.
Thanks to Sam R. Stewart for his contribution and images.

The aircraft and its crew were taking part in an air exercise intended to ascertain the feasibility of operations against the Soviet Union in wintertime. Seven hours into the planned 24-hour flight, and over the Northern Pacific Ocean, three of the giant bomber's six engines caught fire owing to carburetor icing in the intense cold and had to be shut down. The three remaining engines were only producing limited power and the plane could not maintain height. The Mark IV atomic bomb being carried was jettisoned at 8,000 feet inside Canadian waters, and its high explosive detonator created a large shock wave that was visible on the surface. A dummy core was inserted in the bomb before it was dropped, so there was no nuclear explosion. To give his crew a chance of survival the captain took the B-36 to Princess Royal Island where the 16 crew members and one observer bailed out. 12 of the 17 survived their ordeal, but the first 4 to jump were never found, and are presumed to have descended into the freezing sea and died. Capt. Schreier's body was recovered from the crash site in the summer of 1954. The aircraft flew on for another 210 miles with Capt. Schreier at the controls before crashing on the side of Mount Kologet, in British Columbia, 6,000 feet above sea level and northwest of Hazelton. The resting place of 44-92075 went unknown until September 1953 when the wreckage was sighted during an unrelated air search.
Crew killed were:
Cpt Theodore F. Schreier, copilot,
Cpt William Phillips, navigator,
1st Lt Holiel Ascol, bombardier,
S/Sgt Neal A. Straley, gunner,
S/Sgt Elbert W. Pollard, gunner.
Source: ASN

After touchdown, the aircraft went out of control, veered off runway and came to rest in flames. There were no casualties but the aircraft was destroyed.

Crashed in unknown circumstances 7 miles northeast of Raynesford, killing all three crew members.