What happened
During the final approach phase, the first officer was responsible for landing the aircraft. According to the captain, the aircraft crossed the runway threshold at an altitude of 50 to 60 feet above ground level with an airspeed between 110 and 115 knots. The crew had elected to fly slightly faster than normal to account for a small amount of ice remaining on the leading edges of the wings.
As the aircraft entered the flare, it yawned to the left. It reportedly touched down with the nose pointed approximately 15 degrees to the left of the runway centerline. The left main landing gear struck the pavement about 21 feet from the edge of the 150-foot-wide runway.
The captain took control of the aircraft and applied corrective actions, but the airplane departed the paved surface. It subsequently hit a snow bank and mud, causing the nose gear to collapse.
For the aircraft's weight, the normal approach speed was 103 knots. However, according to the flight manual, the approach speed should have been increased by 19 knots if ice was present on the flying surfaces.