• 59-2209 United States Army. Delivered 20-Nov-1959. Designated U-1A.
Initially assigned to the 17th Aviation Company, Fort Ord, CA.
June 1964. The aircraft joined the Otter Transition School, also at Fort Ord, CA.
Feb-1966. To Vietnam joining the 18th Aviation Company.
Accident: Phu Hiep, Vietnam. 10-Mar-1969. Suffered a hard landing causing damage to undercarriage and tailwheel. Repaired and returned to service.
Mar-1971. To the 388th Transportation Company for storage.
May/Jul-1971. Attached to the 165th Combat Aviation Group.
Jul-19771. Returned to the 388th Transportation Company, Vung Tau, Vietnam. . For disposal.
• 0-92209 (Unconfirmed). Passed to the Cambodian Government for the Khmer Air Force. Sep-1971.
Incident: Pochentang. 21 March 1972. Possibly suffered damage in a rocket attack by the Khmer Rouge on the airfield.