Notable accidents
F-117 serial number 79-0785 was lost on 20 April 1982 during takeoff on its maiden flight. The cause was incorrect assembly following a major design change to the flight control computer's inputs sequence, different to that of previous aircraft. As a result, the aircraft went out of control on takeoff, and crashed. Pilot Robert L. Riedenauer was unable to eject in time, and was seriously injured, requiring eight months of hospitalization and was forced to retire from flying. The battered airframe was taken to Skunk Works plant at Burbank, California for use as a functional engineering testbed for component testing.[40]
F-117 S/N 80-0792 was lost on 11 July 1986. The aircraft suffered a controlled descent into terrain, and was destroyed on impact. The pilot, Maj Ross E. Mulhare, was killed in the crash. The cause was determined to be spatial disorientation.[40]
F-117 S/N 85-0815 was lost on 14 October 1987. The aircraft suffered a controlled descent into terrain, and was destroyed on impact about 100 miles north of Nellis Air Force Base, just east of Tonopah. The pilot, Maj Michael C. Stewart, was killed in the crash. The cause was determined to be spatial disorientation.[40]
F-117 S/N 82-0801 Perpetrator was lost on 4 August 1992. The aircraft crashed approximately eight miles northeast of Holloman Air Force Base, and was destroyed on impact. The pilot, Capt John B. Mills, 416th FS, ejected safely. The cause was determined to be an improperly installed bleed air duct.[40]
F-117 S/N 86-0822 was lost on 10 May 1995. The aircraft suffered a controlled descent into terrain, and was destroyed on impact approximately seven miles south of Zuni, New Mexico on the Zuni Indian Reservation. The pilot, Capt Kenneth Levens, was killed in the crash. The cause was determined to be spatial disorientation following autopilot failure.[40]
F-117 S/N 81-0793 was lost on 14 September 1997 during an airshow at Martin State Airport in Baltimore, Maryland. The aircraft suffered a catastrophic wing failure, resulting in the port wing completely separating from the fuselage. The aircraft was destroyed on impact. The pilot ejected safely. The cause was determined to be missing wing bolts.