KC-135A StratotankerBoeing KC 135A Sratotanker airplane model. The Boeing Military Airplane Company's model 367 80 was the basic design for the commercial 707 passenger plane as well as the KC 135A Stratotanker. In 1954 the Air Force purchased the first 29 of its future fleet of 732. The first of these aircraft left the assembly line at Boeing Airplane Company, Renton, Washington, July 18, 1956, and flew for the first time August 31, 1956. The Air Force received its