Civil – U.S. NC17331 c/n1917 – American Airlines NC18111 c/n19831 – United Air Lines N49466 c/n15260 – Johnson Flying Service N44585 c/n9568 – West Coast Airlines N18939 c/n2005 – Central Airlines N15591 c/n2245 – Ozark Air Lines N12935 c/n6335 – Northwest Airlines N1051N c/n13887 – West Coast Airlines N68SA c/n7318 Southern Airways
