The pilot's misidentification of the airport’s active runway, which resulted in an off runway landing and a collision with a snow berm. Contributing to the accident was the runway’s lack of identifying markings.

The failure of the left main landing gear retraction brace assembly, resulting in the collapse of the left main landing gear.

The pilot's inadvertent retraction of the landing gear during the landing roll.

The pilot's failure to extend the landing gear prior to landing. Factors associated with this accident were the pilot's interference with his normal habit pattern, turbulence, and the crosswind condition during landing.