The original Do 28, with two piston engines, was developed from the single engined Do 27. The Do 28 was then redesigned as the Do28 D, with a much larger cabin. The aim was to develop a simple and rugged aircraft for use under arduous conditions, which could be easily maintained. With a crew of two pilots, the cabin accommodated up to 12 passengers; freight could be loaded easily through large double doors and with the seats removed the cabin gave 26.3 m2 of unobstructed space. The first flight of a Do 28D took place on 23 February 1966 and the type was publicly exhibited at the Paris Air Show at Le Bourget airport in June 1967. The Do 28 D was, in turn, re-engined with Pratt and Whitney Canada PT6A-110 turborops in 1980. Just six of this version were produced, this one being the prototype. As seen at Deutsches Museum Flugwerft Schleissheim, Munich, in 2022.