What happened
A flight traveling from Buochs Air Base toward Sion ended in a fatal accident near the Finsteraarhorn mountain. The aircraft, a single-engine plane, was transporting three people, including the pilot and two employees of the Federal Military Department.
During the approach to the mountain range, the aircraft encountered intense atmospheric turbulence and heavy downdrafts. These conditions caused the plane to lose stability and become uncontrollable. The aircraft subsequently struck the terrain of the Finsteraarhorn. There were three fatalities among the occupants, with no survivors reported from the crash site.
Findings
The crash was driven by severe downdrafts and turbulence encountered during the flight phase near the mountain.