Accident Overview
The aircraft was descending for arrival at the destination airport when it sustained a structural failure. The right outer wing, horizontal stabilizer, and vertical stabilizer separated from the aircraft. The aircraft impacted the ground approximately 10 miles from the planned destination. The separation of these components resulted in a loss of structural integrity.
Investigation Results
According to radar data and other research, the descent was conducted at the never-exceed speed (Vne). Additionally, known severe turbulence was present in the area at the time of the accident. The radar data analysis confirmed the aircraft's speed profile. The investigation focused on the aircraft's speed and the environmental conditions.
Probable Cause
The official probable cause was that the pilot flew the aircraft beyond the design maneuvering speed and exceeded the design stress limits. A factor in the accident was clear air turbulence.