Cancelled order for the US Navy as R4Y-2T 145969. Delivered to Superior Oil as CV440-0 N440M in 1958. To Allied Chemical Corp in 1961. Converted to a CV580 in 1965. To Hughes Aircraft as N580HA in 1980 then to Air Resorts Airlines and converted to a Super 580 in 1984. Withdrawn from use at Carlsbad, CA in 1994 and scrapped in 1996.