Accident to the hélicopter BELL B505 registered HB-ZWC on 12/03/24 near Mettlen (SWITZERLAND)

Preliminary data provided by local authorities:

The helicopter rolled over whilst attempting lift-off. The Main Rotor separated from the Main Gearbox.

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General information
Local date	12/03/2024
Responsible entity	Switzerland - AAIB
State or area of occurrence	Switzerland
Location	Proche de Mettlen
Human consequences	Minor
Number of minor injuries	2
Aircraft consequences	Substantial
Occurrence class	Accident
File number	BEA2024-0077

Flight Information
Aircraft category	Helicopter - Small helicopter
Operator	Switzerland - Heli Sitterdorf Ag
Manufacturer / Model	BELL (B505)
Aircraft Registration	HB-ZWC
State of registry	Switzerland
Last departure point	Switzerland - LSZV : Sitterdorf
Planned destination	Switzerland - LSZV : Sitterdorf
Flight phase	Take-off
Serial number	65247
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.