Post war C-54 45-0535 was retired to AMARC in 1971 after US Air Force service. Declared surplus, the aircraft was bought by Dross Metals and registered N3303F in 1975. It returned to flying in 1976 with Aero Union after fire bomber conversion. Registered to Conifair Aviation as C-GBNV in 1981, it was used mainly for spraying Quebec forests to control damage from Spruce budworms. Buffalo Airways bought the aircraft in 1996 and it remains current (at the time of uploading), but has not flown for some time.