What happened
During an ILS approach, the aircraft encountered freezing rain that transitioned into snow. As the aircraft broke through the cloud base at 600 feet above ground level, the pilot noted that approximately 3/8 to 1/2-inch of ice had accumulated on the airframe. The windshield was heavily obscured by ice, leaving only a clear viewing area of roughly 8 inches by 11 inches.
The landing took place at dusk with a 10-knot left quartering tailwind. The pilot touched down on an ice-covered runway in a slight crab. Upon contact with the runway, the left main landing gear tire rolled off its wheel. As the nose gear and the right main landing gear made contact with the surface, both the nose gear and the right main gear collapsed.