What happened
The incident involved a twin engine airplane operating out of RAF Carew Cheriton. During a routine sortie, the aircraft encountered difficulties and subsequently crashed into the Bristol Channel in waters off Swansea. The specific circumstances leading to the crash were not immediately determined. Despite the impact with the water, all four members of the crew were located and rescued from the scene.
Findings
The source material does not provide detailed technical findings or a definitive list of contributing factors beyond stating that the crash occurred in unknown circumstances.