Delivered to Northwest Orient in February 1958 as a DC7C and converted to a freighter in October 1961 for Riddle Airlines, later re-named Airlift International. Sold in 1972 and operated by various freight companies until stored at Madrid, Spain in 1974. Sold to a company called Custom Air Inc in June 1978 and impounded by the authorities in Bogota later the same year. Scrapped by 1996