Incident Overview
A float-equipped Cessna U206G was involved in an accident while in cruise flight approximately 800 feet above the surface of a glacier. The pilot reported the estimated gross weight of the airplane at 3,312 pounds at the time of the event.
Flight Conditions and Sequence
The aircraft was flying in an up-glacier direction within a mountainous valley. The prevailing surface winds, as reported by the pilot, were 15 knots in a down-glacier direction. During the flight, the airplane began to descend rapidly. The pilot applied full power, but the descent was not arrested.
Aircraft Performance Data
According to the Cessna U206G performance charts, the airplane's expected climb rate under the prevailing conditions was between 915 and 1,005 feet per minute.
Pilot Actions and Terrain Collision
The pilot stated that there were no mechanical problems with the airplane. He did not attempt to turn because the most favorable landing terrain was ahead of the aircraft. The airplane subsequently collided with slightly rising terrain in a wings-level, nose-up attitude. The stall warning horn activated just prior to impact.
Damage and Occupants
The airplane sustained substantial damage as a result of the collision. The four occupants on board reported no injuries.