One crew member's body has never been found.[32][33] On 22 October 1987, the pilot of British Aerospace Harrier GR5 serial number ZD325 was accidentally ejected from his aircraft over Wiltshire, England; the aircraft continued on its own until fuel exhaustion caused it to crash into the Irish Sea. The pilot was killed.[34][35] On 4 July 1989, the pilot of a Soviet Mikoyan-Gurevich MiG-23, presuming he had engine problems, ejected from his aircraft. The aircraft continued on its own, flying out of the former East Germany into the West German Air Defence Zone and was then escorted by United States Air Force F-15s until it ran out of fuel and crashed into a house in Belgium, killing the occupant of the house.[36]