What happened
During a night landing on Runway 3, the pilot touched down on the centerline. As the aircraft's speed decreased, the pilot applied the brakes. Shortly after, the aircraft began to swerve. The pilot momentarily ceased all braking and then reapplied pressure using the right brake and rudder because the left main gear had encountered a rough, icy area located off the left side of the runway.
While the aircraft appeared to straighten and begin moving back toward the centerline, the left wing subsequently struck a snowbank on the left side of the runway. This impact caused the aircraft to spin to the left into a pile of snow. The force of the excursion resulted in the collapse of the left main gear and the subsequent collapse of the nose gear. The pilot reported that there were no mechanical malfunctions involved in the event.