What happened
During a flight intended for instruction and familiarization training, a float-equipped airplane experienced an aerodynamic disturbance shortly after departing. The flight instructor, occupying the right seat, was providing training to a commercial pilot seated in the left seat. This was the first flight of the day.
As the aircraft climbed to an altitude of approximately 50 feet above the water, the airplane began to buffet and the right wing dropped. Following this loss of control, the aircraft descended and struck an area of tundra-covered marshy terrain. The impact resulted in substantial damage to the wings, fuselage, and empennage.
The investigation
A post-accident inspection of the aircraft was conducted following the impact with the marshy terrain. This inspection revealed an accumulation of frost on the wings.