[1] The prototype Cabinaire was formed around a welded steel tube Travel Air 2000 fuselage modified for an enclosed cabin.

The interior used velour finishing, nickel plating, mohair rugs, mahogany panels and roll-down windows.

In 1929, Viola Gentry and Jack Ashcroft attempted an endurance record for flight with aerial refueling in a modified Cabinaire SN#5 named The Answer.

The name was chosen in response to the Army aircraft that had completed previous endurance records, the Question Mark.

The Answer crew was unable to refuel after the first ten hours of flight due to fog and crashed 28 June 1929, killing Ashcroft.