Ca.1974: TOS USAF as A-37B. Ca/1980: Redesignated OA-37B. By 1985: 169th Tactical Air Support Squadron/182nd Tactical Air Support Group (ANG), Peoria, IL. 6/92: TOS Chile Air Force with s/n J-637. Assigned to Aviation Group 12. 2009: WFU, stored with Chilean Air Force at BA El Bosque.