The aircraft, flown by Pilot Officer W Duffy DFC, RCAF, was on a flight from its base at Woodhall Spa to Wainfleet Bombing Range, England , training to drop marker bombs from low level. It made 3 successful drops, but on the fourth and final run the aircraft made a climbing turn to port and the starboard engine broke off from the wing and the wing collapsed. The aircraft crashed into shallow water and and both occupants were killed. The navigator of the aircraft was Flying Officer P Ingleby RAF. Duffy had just completed his operational tour and was due to return to Canada. His promotion to Flight Lieutenant came through the same day.