Casualty Evacuation Flight was formed in May, 1950, at Royal Air Force Station, Changi, and was disbanded on the 31st January, 1953, and its aircraft and personnel were absorbed into No 194 Squadron, on formation, at R N A S, Sembawary

The helicopters, Westland Dragonfly II (S 51 with fabric blades) were assembled and test-flown at Seletar in April, 1950 When the unit based at Changi trials were carried out to deduce the aircrafts performance using as many combinations of individual pilot and aircraft as possible at various times throughout the day to obtain varying humidity and temperature variations and their effects on performance