Approach and Landing
The pilot executed a normal approach and landed the airplane with the throttle closed on a runway that had patches of slushy snow and ice, along with some blowing dry snow. The airplane touched down on the centerline at approximately 60 knots, and the pilot kept his feet off the brakes during the rollout.
Loss of Directional Control
About 500 feet into the rollout, the airplane began to yaw, then slowly veer and skid to the left. The pilot attempted to straighten the airplane by increasing right rudder pressure. He also considered aborting the landing, but given the airplane's slow speed and its proximity to a 4-foot snow bank, he decided an abort would be unsuccessful.
Collision with Snow Bank
The airplane continued to veer to the left and hit the snow bank at approximately a 30-degree angle, at about 30 miles per hour.
Wind Conditions
Winds around the time of the accident were from approximately 15 degrees left of the runway at 5 knots.
Pilot Experience
The pilot had 92 hours of flight time and had previous experience landing on contaminated runways.