ASN logo
ASN Wikibase Occurrence # 263541
Last updated: 27 January 2022
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information. If you feel this information is incomplete or incorrect, you can submit corrected information.

Time:10:20 LT
Type:Silhouette image of generic G2CA model; specific model in this crash may look slightly different
Guimbal Cabri G2
Owner/operator:Swiss Helicopter
Registration: HB-ZDQ
MSN: 1051
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Minor
Category:Serious incident
Location:near Vaulruz -   Switzerland
Phase: En route
Departure airport:Gruyères Airfield (LSGT)
Destination airport:Gruyères Airfield (LSGT)
Investigating agency: STSB Switzerland
During an instructional flight, the the instructor demonstrated to the student the behaviour of the helicopter at high speed, i.e. close to Vne equivalent to 119 kt at a pressure altitude of 5500 ft.
At a speed of 110 knots the cockpit windscreen broke.
It appeared that the suction cup mountaing for an on-board camera, created additional stresses on the one-piece canopy and consequently weakened it.

The serious incident was caused by the shattering of the canopy during a flight near the Vne. The installation of a of an on-board camera attachment system contributed to the unexpected breakage of the canopy.
The helicopter manufacturer decided to issue a service letter, SL 20-001 A, informing owners to refrain from using a suction cup mounting system on the canopy.
Neither the instructor nor the student pilot was wearing a helmet with a visor. Fortunately, in this incident the injuries were only superficial and did not affect the instructor's vision.
In this regard, Airbus Helicopters issued the safety promotion notice on 7 December 2020, No. 3587-P-00, for the systematic use of a helmet.


Accident investigation:
Investigating agency: STSB Switzerland
Status: Investigation completed
Download report: Final report


Revision history:

02-Jun-2021 15:24 harro Added
30-Oct-2021 09:52 Aerossurance Updated [Source, Embed code]

Corrections or additions? ... Edit this accident description