THE DTSB
The DTSB determines the Probable Cause of this accident to be Pilot Error, in that the pilot failed to sufficiently circumnavigate an area of convective activity containing known storm cells, and failed to reduce his aircraft speed to at or below maneuvering speed (Va) prior to sustaining airframe loads that exceeded the structural limits of the airframe. The aircraft first lost pitch control as both ruddervators departed the aircraft individually, then eventually both wings. The fuselage was found generally intact with all three deceased still in their approximate respective seated positions. All three had likely been alive and conscious for the 90 second fall from altitude.