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ASN Wikibase Occurrence # 188388
Last updated: 25 November 2021
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Type:Schempp-Hirth Nimbus 3/25.5
Registration: HB-1638
MSN: 15
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Aircraft damage: Substantial
Location:Sion Airfield - LSGS -   Switzerland
Phase: Take off
Departure airport:LSGS
Destination airport:LSGS
Investigating agency: STSB Switzerland
The glider crashed inverted on the ground at Sion Airfield - LSGS after an aborted take-off. The pilot (63) suffered head-injuries. The glider sustained substantial damages.

The accident, in which the large glider pitched up at the beginning of the tow and overturned, was caused by the the glider topped out at the beginning of the tow, because the glider pilot did not unhook the tow cable when the glider touched down with the wing tip while taxiing. Subsequently, the glider moved sideways so that the pilot lost control of the aircraft during the takeoff.
During the investigation, the procedure at Sion airport, which requires that the the tow path not to be aligned with the runway axis from the start, was identified as a factor to risk.


Accident investigation:
Investigating agency: STSB Switzerland
Status: Investigation completed
Duration: 4 years and 10 months
Download report: Final report


Photo: Police cantonale valaisanne

Revision history:

26-Jun-2016 18:56 Alpine Flight Added
09-Dec-2020 09:55 harro Updated [Photo]
19-May-2021 12:30 harro Updated [Narrative, Accident report]

Corrections or additions? ... Edit this accident description