04/19/2007. Remarks by Jack McKillop: "This was the 362nd 737 built and made its first flight on July 2, 1974. Ten days later, it was delivered to the USAF. This aircraft was initially assigned to the 323d Flying Training Wing, Air Training Command, based at Mather AFB, Sacramento, California, USA and used to train navigators destined to fly in transport and tanker aircraft. In May 1993, the aircraft was transferred to the 562d Flying Training Squadron, 12th Flying Training Wing, Nineteenth Air Force, Air Education and Training Command, based at Randolph AFB, San Antonio, Texas. While there, it was named "The Spirit of San Antonio". It was withdrawn from use and stored at Phoenix Goodyear Airport, Goodyear, Arizona. In 2001, it was redesignated NT-43A and converted at Palmdale, California, for use as a radar test bed for Stealth aircraft programs."