Delivered to the USAAF as B-18A 38-593 in 1939. Converted to a B-18B in 1942. Sold as N66267 in 1946. To Roberts Aircraft in 1951. Used as a crop sprayer and a fire bomber. Stored at Litchfield Park, AZ in 1969. Transported by road to the museum in 1976. Restored and repainted in USAAF colours as 8593 by 1997.