What happened
A single pilot and one passenger departed on a cross-country flight in a light business jet while operating in instrument meteorological conditions. Shortly after takeoff, air traffic control directed the pilot to climb to 14,000 feet. Approximately three minutes later, the pilot reported a failure within the aircraft's flight management system. The pilot subsequently requested a climb to reach visual meteorological conditions, and throughout the flight, the pilot communicated that they were losing instrument functionality and were hand-flying the aircraft.
Radar monitoring showed that the aircraft performed several climbs and descents with significant fluctuations in airspeed over a ten-minute period. Approximately two minutes before radar contact was lost, the aircraft entered a climbing right turn, reaching a maximum altitude of 21,000 feet. This was followed by a tightening, rapidly descending turn. During this maneuver, the aircraft reached a partially-inverted attitude, surpassed its design maneuvering speed, and achieved a descent rate of approximately 36,000 feet per minute. Radar contact ended at roughly 16,000 feet, and the aircraft suffered an inflight breakup. The resulting debris field spanned approximately 3/4-mile in length and 1/3-mile in width.
Findings
Post-accident inspections of the airframe and engines showed no evidence of pre-existing conditions, and all structural fractures were attributed to ductile overload. While the pilot reported instrument issues, testing of the flight instruments did not reveal the cause of the reported anomalies. The aircraft featured three independent sources of attitude information; investigators noted it was unlikely for all three to fail at once, especially since a standby attitude indicator and compass remained available for manual reference.
Operating as a single pilot in a high-stress, high-workload environment, the pilot was highly vulnerable to distraction. The investigation concluded that the pilot likely experienced spatial disorientation, leading to the loss of aircraft control.