30 Jan' 82: First flight. 10Feb '82: TOS USAF and assigned to the 51st Tactical Fighter Wing, Sunan Air Base, South Korea. Ca.1990: Modified to OA-10A. 4 Jan '00: AMARC, Davis-Monthan AFB, AZ as AC0197 for GPS and wing modifications. 25 Feb'00 to after 3/20: 422nd Test and Evaluation Squadron/53rd Test and Evaluation Group (later 53rd Wing), Nellis AFB, NV. Ca.2007: Converted to A-10C.