One of the first three Caribous received by the US military, constructed as a YAC-1 and first flown with test registration CF-LKU-X. The trio were delivered to the US Army in October 1959. In August 1961 it became the first of type to be deployed to Vietnam and was used as the South Vietnamese president's aircraft. Leased to Air America in 1962. In 1967 it was assigned to HQ USAF Logistics Command as a YC-7A at Wright Patterson AFB, returning to the Army Aviation Test Board, Texarkana, TX in 1970. In 1975 it flew with the Army Helicopter Demo Team (Silver Eagles), joining the museum in 1983

Photographer: Fred Guthrie.

First Caribou delivered to US Army and first to operate in Vietnam, arriving August 1961. To Air America May 1962, then back to U.S. in February 1966. To USAF on 1 January 1967 and redesignated YC-7A. Assigned back to US Army and used at several locations including Redstone Arsenal in Huntsville, Alabama. From July 1975 - January 1977 it was the logistic support a/c for the Army's Silver Eagle Helicopter Team. Transferred to the museum in September 1983.

The fourth Caribou built preserved wearing an unusual plain olive green scheme.