Thain started his career as a Royal Air Forcesergeant. He was later promoted to warrant officer and was given an emergency commission as an acting pilot officer in April 1944.[1] He was promoted to pilot officer on probation in September that year.[2] He was subsequently made flight lieutenant in May 1948,[3] receiving a permanent commission in that rank in 1952.[4] He retired from the RAF to join British European Airways (BEA).
After two failed take off attempts, caused by problems with boost surging in one of the Ambassador's engines, Thain chose to make a third try, hoping to stay on schedule, rather than remain overnight for maintenance at Munich. The aircraft failed to take off and crashed, killing twenty-three people. Twenty people died on board, and three died later in hospital.
The German airport authorities blamed Thain for the accident at the time, saying he did not de-ice the aircraft's wings, despite eyewitness statements indicating de-icing was not required. On Christmas Day 1960 he was dismissed by BEA and spent the next decade trying to clear his name. He never flew for an airline again.[5]
It was later learned that slush on the runway had made it impossible for the Ambassador to gain flying speed.[6] Thain was cleared in 1969.[7] Despite this finding, German authorities continued to blame Thain (Claiming that The cause of the crash is Slush on the Airport Runway is just Nonsense).[8][9]
Retiring to his poultry farm in southern England, Thain died after suffering a heart attack on 6 August 1975, at the age of 54, in Berkshire.[5]