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| Date: | Monday 4 September 2023 |
| Time: | 12:10 |
| Type: |  Guimbal Cabri G2 |
| Owner/operator: | Aéroclub de Genève |
| Registration: | HB-ZOW |
| MSN: | 1038 |
| Year of manufacture: | 2012 |
| Engine model: | Lycoming O-360-J2A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Other fatalities: | 0 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Duillier -
 Switzerland
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Training |
| Departure airport: | Genève-Cointrin Airport (GVA/LSGG) |
| Genève-Cointrin Airport (GVA/LSGG) | |
| Investigating agency: | STSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
On returning to base after an autorotation training session, the crew noted damage to the main rotor blades, tail boom and landing gear.
The serious incident, in which the helicopter made hard contact with the ground and sustained damage to the blade tips, tail boom and skid hoops, was due to the fact that, during an autorotation exercise, the throttle was only opened during the flare phase with the RRPMs reduced, resulting in a loss of control of the helicopter.
By returning the helicopter to the take-off aerodrome after hard ground contact, without carrying out an inspection by qualified personnel, the crew exposed themselves to an avoidable risk.
Accident investigation:
 |
|
Sources:
STSB
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 19-Feb-2024 11:13 | ASN | Added |
| 11-Nov-2024 17:16 | ASN | Updated [Other fatalities, Narrative, Accident report, ] |
Corrections or additions? ... Edit this accident description
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