What happened
During a scheduled cargo operation, a single-pilot flight was cruising within instrument meteorological conditions when the aircraft encountered moderate to severe turbulence. The area contained weather cells that were visible on the onboard radar. In an attempt to avoid these cells, the pilot initiated a turn to reverse course and declared an emergency. During this maneuver, the pilot lost control of the aircraft, which subsequently entered an uncontrolled descent. The impact with the terrain resulted in the total destruction of the aircraft and the death of the sole occupant.
Findings
Investigations into the accident identified several contributing factors regarding the pilot's training and the environmental conditions. It was determined that the pilot lacked proficiency in recovering from unusual attitudes and did not possess a functional understanding of the installed weather radar system. Furthermore, the operator's training program and FAA oversight were found to be inadequate, as they did not require demonstrations of proficiency in specific maneuvers or radar operations.
Additional factors contributing to the loss of control included:
- The pilot's decision to fly into known adverse weather conditions.
- Spatial disorientation during the maneuvering phase.
- Pilot fatigue resulting from a lack of sleep.
- The encounter with severe turbulence that precipitated the loss of control.