In 1967 or 68, work was started on a redesign of the Twin Courier in a tricycle-gear configuration for the commercial market, since many firms which desired STOL capability had regulations which required multi-engine aircraft.
In 1967 or 68, work began on a redesign of the Twin Courier in a tricycle-gear configuration for commercial use, as many companies seeking STOL (Short Takeoff and Landing) capabilities had regulations that mandated multi-engine aircraft.