Beset by early construction problems, the first FSD aircraft was transferred to Groom Lake in May 1981 inside a C-5. Further problems, this time with fuel leaks, delayed the first flight. Under the control of Harold Farley, the aircraft took off on 18 June for its maiden flight, nine months after the July 1980 first flight originally envisaged. The first production F-117A was delivered in 1982, and operational capability was achieved in October 1983; the 59th and last F-117A was delivered in 1990.