 Jerry Winston purchased the manufacturing rights to the DuMod conversion but only three Beech 18s were ever converted.Some of the Beech 18s were also used on night mail and freight runs, and the seats were put back in for the passenger flights during the day.Commuter Airlines also operated Piper PA-31 Navajos and Chieftains and operated the first passenger Fairchild Metros in 1972, eventually acquiring four of them.