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ASN Wikibase Occurrence # 240706
 
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Date:25-JUL-2020
Time:15:52 LT
Type:Silhouette image of generic as23 model; specific model in this crash may look slightly different    
Schleicher ASK 23B
Owner/operator:Segelfluggruppe Olten
Registration: HB-1796
MSN: 23016
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:Zweisimmen Flugplatz (LSTZ) -   Switzerland
Phase: Take off
Nature:Private
Departure airport:Zweisimmen Airfield (LSTZ)
Destination airport:Zweisimmen Airfield (LSTZ)
Investigating agency: STSB Switzerland
Confidence Rating: Accident investigation report completed and information captured
Narrative:
During a take-off in aerotow, the glider began to oscillate around its transverse axis immediately after take-off and hit the runway hard several times. The pilot released the tow rope and landed the glider next to the runway in a meadowland.

Conclusions
The accident, in which the pilot lost control of the glider during the tow launch as a result of oscillations about the lateral axis, was due to a launch abort initiated too late.
An elevator trim that was set too top-heavy contributed to the accident.

Sources:

https://www.sust.admin.ch/inhalte/AV-berichte/HB-1796.pdf

Accident investigation:
cover
  
Investigating agency: STSB Switzerland
Status: Investigation completed
Duration: 1 year and 7 months
Download report: Final report


Revision history:

Date/timeContributorUpdates
31-Aug-2020 08:13 harro Added
10-Mar-2022 15:19 harro Updated [Narrative, Accident report]

Corrections or additions? ... Edit this accident description

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