After a small run of aircraft constructed to British specifications, as the Bolingbroke Mk I, Fairchild switched production to the Bolingbroke Mk IV with American instruments and equipment.
Efter at have fremstillet et begrænset antal fly efter britiske specifikationer som Bolingbroke Mk I, skiftede Fairchild over til Bolingbroke Mk IV med amerikanske instrumenter og udstyr.