Background
The pilot, holding a commercial certificate, was operating a tundra tire-equipped airplane in a remote area adjacent to a frozen river. The previous day, the pilot had landed at the same location to assist a passenger in locating a lost snow machine.
Accident Sequence
On the day of the accident, approximately 4 to 6 inches of snow had fallen overnight in the area. The pilot landed the airplane on the same tracks used during the previous day's landing. During the landing roll, the new snow layer caused a dramatic deceleration, and the airplane nosed over.
Damage
The airplane sustained damage to the vertical stabilizer, the rudder, and the left wing lift strut.