In 1937, the Air Corps bought three Lockheed Electra Model 10-A twin engine aircraft. These planes were designated Y1C-36 and were essentially identical to the civilian version. The three planes were initially used as senior staff transports throughout the mid and late 1930s. One Y1C-36 crashed in 1938, but the remaining two aircraft were used for regular transport and utility missions during the 1940s into the World War II era. In 1938, the Y1C-36s were re-designated C-36 and later UC-36 (Utility Cargo) in 1943.
The UC-36s were eventually sold to the Brazilian Air Force and served into the early 1950s. 03/06/2007 @ 11:24 [ref: 15795]