NTSB Factual Report

The pilot reported that while taking off from a frozen lake, the airplane veered to the left. He stated that at the point of rotation, the left wing struck a snow bank which spun the airplane in a counter-clockwise direction. The airplane's nose wheel then struck the snow bank and the airplane nosed over. He reported no mechanical malfunctions of the airplane.

NTSB Probable Cause

The pilot's failure to maintain directional control during takeoff which resulted in the airplane striking a snow bank.