Accident Description
During the final segment of the approach, the aircraft became unstable, rolling to the right and left. This instability caused the right wing to strike the runway surface, followed immediately by the left wing. The aircraft then cartwheeled and came to rest. All four occupants escaped without injury, but the aircraft sustained damage beyond repair.
Probable Cause
The official investigation determined the probable cause to be improper operation of flight controls, which led to the cartwheel on landing.
Contributing Factors
Two contributing factors were reported: unfavorable wind conditions and snow showers.