Accident to a Guimbal Cabri G2 registered HB-ZVK on 30/09/2021 at Ägerten

Preliminary data based on the notification from the Swiss authorities:

After an autorotation exercise, the main rotor rpm dropped sharply when increasing power with the collective. The helicopter subsequently landed hard on a field and was severely damaged.

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General information
Local date	30/09/2021
Responsible entity	Switzerland - AAIB
State or area of occurrence	Europe and North Atlantic - Switzerland
Location	Ägerten
Human consequences	None
Aircraft consequences	Substantial
Occurrence class	Accident
File number	BEA2021-0487

Flight Information
Aircraft category	Rotorcraft - Helicopter - Small/light Helicopter - Small Helicopter
Operator	Switzerland (Swiss Helicopter AG)
Manufacturer / Model	GUIMBAL - CABRI
Aircraft Registration	HB-ZVK
State of registry	Switzerland
Last departure point	Switzerland - LSXP : Pfaffnau
Planned destination	Switzerland - LSXP : Pfaffnau
Flight phase	Landing
Serial number	1279
Operator Type AG	Flying club/school
Operation Type	Non-Commercial Operations - Flight Training/Instructional - Dual

BEA is the French air safety investigation authority for civil aviation. The sole objective of the investigation is to improve air safety. It is intended neither to apportion blame nor to assess responsiblity.