What happened
During the cruise phase of flight, the pilot was notified by air traffic control regarding significant areas of heavy precipitation along the intended route. Despite these warnings, the pilot maintained the original flight path, reporting that onboard radar did not indicate any significant weather build-ups. While authorized to deviate from the route at their discretion, the pilot continued through the area and subsequently disappeared from radar tracking during a right-hand descent at 16,800 feet MSL.
Eyewitnesses observed the aircraft emerging from the base of a cloud at approximately 1,000 feet AGL. During this period, the wings were seen to detach from the fuselage. The remaining components, including the engines, empennage, and fuselage, were observed descending in an inverted position before impacting a cornfield. The resulting debris field spanned roughly 1.5 miles in length and 0.5 miles in width. Prior to departure, observers noted significant irregularities during the preflight process, describing the cockpit environment as chaotic. It was also reported that the aircraft moved forward six times on the ramp during an extended checklist period while engines were running at high RPM.
All four occupants were killed in the accident.
Findings
Investigations into the accident identified several contributing factors related to the pilot's actions and the environmental conditions. The primary cause was determined to be the flight into known adverse weather, specifically a thunderstorm. Additional findings included:
- Inadequate preflight planning and in-flight decision-making by the pilot in command.
- Failure to follow air traffic control weather advisories.
- Inadequate visual or aural perception of hazards by the pilot.
- Insufficient flight experience of the pilot in command.
- Structural failure caused by exceeding the design stress limits of the aircraft, leading to the separation of the wings, engine assemblies, and flight control surfaces.