Incident Overview
According to a witness, an airplane executed a short field approach to a runway that had been used by three preceding aircraft. The wind was estimated at 5 knots at the time, but it shifted 180 degrees, causing the airplane to touch down long. After touchdown, the airplane ground looped and subsequently went over a river bank at the end of the runway.
Airport and Environmental Conditions
The airport was located in an area surrounded by mountains, with the river at the end of the runway providing the only opening. It was known for wind shifts, which were a recognized characteristic of the location.
Pilot Statement
The pilot stated that he never noticed the wind shift during the approach or landing.