The Capelis XC-12 featured an unusual construction method with the main wing spar bolted together, and much of the metal skin attached with P-K self-tapping screws rather than rivets. These tended to vibrate loose, requiring tightening or replacing screws every few flights. After a 1938 emergency landing caused structural damage, promotional tours were quickly abandoned. The aircraft was then sold to RKO in 1939. The transport ended its career as a non-flying film prop, appearing in ground roles (in the 1942 "Flying Tigers", starring John Wayne, and in other features) before reportedly being scrapped around 1950, after having slowly become a back lot relic. Flying shots in "Five Came Back" used a XC-12 miniature, due to the aircraft having been permanently grounded by the studio's insurance company.