De Havilland U-6A Beaver From 1952-1960, De Havilland Aircraft of Canada manufactured the U-6A (designated L-20 until 1962), delivering nearly 1,000 to the United States' armed services. Although flown mostly by the U.S. Army, the U.S. Air Force employed more than 200 U-6As, primarily for aeromedical evacuation. However, the USAF also used the U-6A aircraft for courier service, passenger transport, light cargo, reconnaissance, rescue and aerial photography missions. The U-6A saw USAF service in