• 56-0389 US Army # 1697. L-20 No. 698. Command A-11. Delivered 26-Jun-1957. Built as L-20A and re-designated U-6A in 1962.
• L-203 Air America, Vientiane, Laos. 01-Mar-1962 to Apr-1963.
Air America Service history: L-203 arrived at Bangkok, Thailand, in crates on 15-Feb-1962, to be operated under the Madriver Contract AF62(531)-1674, based at Vientiane, but maintained at Udorn. The aircraft was assembled by Thai Airways and officially received at Bangkok on 01-Mar-1962. The aircraft was to be returned to the US Army in Oct-1962 but actually returned on 21-Apr-1963. The original Jan-1962 Air America Inc.,Military Assistance Advisory Group (MAAG) Madriver contract which was to support the Army White Star Special Forces included the services of seven U-6A Beavers. They were operating from and serviced at the Udorn Air Base near the 380-ac. munitions storage depot, code-named “Peppergrinder” located 5 mi. south of Udorn. In Oct-1962 this Beaver operation was completely withdrawn, to be replaced by Helio Couriers.
• 56-0389 US Army - served with 508th US ASA Group Army Security c.1964