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ASN Wikibase Occurrence # 233123
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Type:Silhouette image of generic DIMO model; specific model in this crash may look slightly different    
Diamond HK-36TTC Super Dimona
Owner/operator:Vol voile Club Valais
Registration: HB-2360
MSN: 36673
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Minor
Location:near Sion Airport (SIR/LSGS), VS -   Switzerland
Phase: Approach
Departure airport:Sion Airport (SIR/LSGS)
Destination airport:Sion Airport (SIR/LSGS)
Investigating agency: STSB Switzerland
Confidence Rating: Accident investigation report completed and information captured
On short final for runway 25, the motor glider hit a tree and came to a stop against the perimeter fence.
Both occupants were not injured.

Analysis and conclusions
The accident was due to a loss of visual references on final which induced the pilot to fly an approach well below the planned approach path causing a collision with a ground obstacle.
The lack of clarity in the exact definition of the roles of the two persons on board was an aggravating factor in the accident. Neither of the pilots on board also considered a missed approach with a go-around following the loss of visual references.

Sources: (photo)

Accident investigation:
Investigating agency: STSB Switzerland
Status: Investigation completed
Duration: 1 year and 2 months
Download report: Final report

Revision history:

21-Feb-2020 09:25 gerard57 Added
21-Feb-2020 10:15 RobertMB Updated [Aircraft type, Registration, Cn, Operator, Location, Destination airport, Source, Narrative]
16-Jul-2020 07:29 harro Updated [Departure airport, Source, Narrative]
21-Apr-2021 10:42 harro Updated [Narrative, Accident report]

Corrections or additions? ... Edit this accident description

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