• 56-409 US Army # 1737. L-20 N0. 738. Command A-11. Delivered 29-Oct-1957. Built as L-20A and re-designated U-6A in 1962.
• L-204 Air America, Vientiane, Laos. 01-Mar-1962 to Jan-1963.
Note: Air America Service history: arrived at Bangkok in crates on 15-Feb-1962, to be operated under the Madriver Contract AF62(531)-1674. It was assembled by Thai Airways and officially received at Bangkok on 01-Mar-1962. It was based at Vientiane, but maintained at Udorn. It was to be returned to the US Army in Oct-1962, but actually returned on 26-Jan-1963.
• 56-409 Returned to US Army. 26-Jan-1963.
• N81847 Kenmore Air Harbor, Kenmore, WA. Dates unknown.