• 55-3311 United States Army. Delivered 09-Nov-1956. Designated as U-1A.
It first served with the 3rd Aviation Company, Fort Riley, KS.
Jul-1957. Moved with the unit when it deployed to Illesheim, Germany.
Nov-1959. 207th Aviation Company based at Heidelberg, Germany until Mar-1964 when it returned to the USA.
May-1964. Army Aeronautical Depot Maintenance Center (ARADMAC) Depot, Corpus Christi, TX., where it was placed in storage.
Jan-1967. Joined the Inter American Geodetic Survey (IAGS) in Panama.
Apr-1968. Arrived at the Sharpe Army Depot, Stockton, CA., where it was prepared for shipment to Vietnam.
Oct-1968. Attached to the 388th Transportation Company, where it was prepared for service in Vietnam.
Feb-1969. 18th Aviation Company, Pleiku, Vietnam, for whom it flew until Feb-1971.
Feb-1971. 388th Transportation Company, Vung Tau, Vietnam for storage.
• 53311 Assumed serial. Handed over to the Government of Cambodia for the Khmer Air Force, Sep-1971. Destroyed during rocket attack on Pochentong airfield on 21-Mar-1972 and withdrawn from use.