Accident Eurocopter EC 120B Colibri HB-ZCA, 12 Jun 2021
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ASN Wikibase Occurrence # 263980
 
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Date:12-JUN-2021
Time:11:39 LT
Type:Silhouette image of generic EC20 model; specific model in this crash may look slightly different    
Eurocopter EC 120B Colibri
Owner/operator:Heli-Lausanne SA
Registration: HB-ZCA
MSN: 1092
Fatalities:Fatalities: 0 / Occupants: 5
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:Lausanne AIrport (LSGL) -   Switzerland
Phase: Landing
Nature:Passenger - Non-Scheduled/charter/Air Taxi
Departure airport:Lausanne-La Blécherette Airfield (QLS/LSGL)
Destination airport:Lausanne-La Blécherette Airfield (QLS/LSGL)
Investigating agency: STSB Switzerland
Confidence Rating: Accident investigation report completed and information captured
Narrative:
Shortly before 9 am, the helicopter took off with five people including two children on board for a pleasure flight towards Montreux and then the Dents du Midi.
On return from the flight, the helicopter was on final for runway 18, at the end of which the pilot executed a left turn out of ground effect to reach the tarmac of the departure hangar. During this turn, the pilot was unable to stop the maneuver and the helicopter rotated several times around the left yaw axis before landing hard on the runway edge.
The helicopter stabilized in the grass with the right landing gear collapsed. No occupants were injured.

Conclusions
The loss of yaw control was due to an inappropriate foot action at the time of the turn stop in relation to the power demanded. The pilot's final reaction of reducing power by lowering the collective prevented more serious damage. A full right kick would have stopped the turn and prevented damage to the aircraft.

Sources:

https://polizeiticker.ch/artikel/lausanne-vd-hubschrauber-bei-der-landung-abgesturzt-189940
https://www.sust.admin.ch/inhalte/AV-berichte/HB-ZCA.pdf
https://cdn.jetphotos.com/full/6/16630_1551356380.jpg (photo)

Accident investigation:
cover
  
Investigating agency: STSB Switzerland
Status: Investigation completed
Duration: 1 year 1 month
Download report: Final report


Revision history:

Date/timeContributorUpdates
13-Jun-2021 17:09 gerard57 Added
13-Jun-2021 19:52 RobertMB Updated [Time, Aircraft type, Registration, Cn, Operator, Location, Destination airport, Source, Narrative]
03-Jul-2021 14:59 harro Updated [Time, Departure airport, Source, Damage, Narrative]
03-Aug-2022 09:35 harro Updated [Nature, Narrative, Accident report]

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