Accident Details
On 18 December 2021, at 16:10 local time, a McDonnell Douglas Helicopter Systems 500N, registration HB-ZBM, experienced an accident at Unteriberg, Canton of Schwyz, Switzerland. The helicopter was operated by Robert Fuchs AG, doing business as Fuchs Helikopter, and owned by Helivetia AG.
Flight Information
The flight was conducted under Visual Flight Rules (VFR) as a private operation. The departure point was a field landing site at Eischen (AI) (designated ZZZZ) and the intended destination was Heliport Schindellegi (LSXS). The pilot was the sole occupant; there were no crew members, passengers, or third parties on board.
Accident Sequence
During the landing phase, while executing an autorotation, the helicopter rolled over to the left upon touchdown.
Damage Assessment
The helicopter was seriously damaged. The ground sustained light damage due to a small amount of spilled liquids.
Investigation Status
The Swiss Transportation Safety Investigation Board (STSB) issued a preliminary notification on 5 January 2022, stating that an investigation is in progress. This report contains only short preliminary information and does not include conclusions or a probable cause.