Accident Bücker Bü-131APM Jungmann HB-UVB,
ASN logo
ASN Wikibase Occurrence # 238828
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information. If you feel this information is incomplete or incorrect, you can submit corrected information.

Date:Tuesday 28 July 2020
Time:c. 15:45
Type:Silhouette image of generic BU31 model; specific model in this crash may look slightly different    
Bücker Bü-131APM Jungmann
Owner/operator:Groupe de vol à moteur de la Gruyère
Registration: HB-UVB
MSN: 39
Year of manufacture:1939
Fatalities:Fatalities: 0 / Occupants: 2
Aircraft damage: Substantial
Location:near Gruyères Airfield (LSGT), Epagny, Freiburg -   Switzerland
Phase: Approach
Departure airport:Gruyères Airfield (LSGT)
Destination airport:Gruyères Airfield (LSGT)
Investigating agency: STSB
Confidence Rating: Accident investigation report completed and information captured
After an unstabilized landing on runway 35, the pilot decided to take off again. During the initial phase of the take-off, the aircraft struck trees in a clearing on the right.

Analysis and Conclusions
The pilot decided to undertake the flight in an unstable atmosphere with a moderate westerly wind that strengthened during the initial approach. As a result, the circuit for runway 35 had to be flown in turbulent conditions. Not surprisingly, the landing became more difficult due to the crosswind component. As a result, the pilot wisely decided to overshoot when he realized that the landing was not guaranteed.
The forward visibility, especially on the climb path, after take-off or go-around is limited on the Bücker. Pilots of this aircraft are accustomed to tilting their heads to the left to obtain forward visibility. During the go-around of HB-UVB, the pilot did not notice the dangerous drift to the right side of the runway due to the strong crosswind component.
As a result, the collision with the trees bordering the runway took him completely by surprise.
The accident was caused by a collision with the trees on the right side of runway 35 due to an unnoticed lateral deviation during a go-around in a crosswind.

Accident investigation:
Investigating agency: STSB
Report number: 
Status: Investigation completed
Duration: 1 year and 4 months
Download report: Final report


Revision history:

30-Jul-2020 06:35 gerard57 Added
30-Jul-2020 10:14 RobertMB Updated [Time, Aircraft type, Registration, Cn, Operator, Location, Phase, Destination airport, Source, Narrative]
30-Jul-2020 10:17 RobertMB Updated [Location]
30-Jul-2020 14:52 gerard57 Updated [Narrative]
13-Aug-2020 07:46 harro Updated [Location, Departure airport, Destination airport, Source, Damage, Narrative]
13-Aug-2020 07:46 harro Updated [Registration, Location]
06-Dec-2021 20:54 harro Updated [Narrative, Accident report]

Corrections or additions? ... Edit this accident description

The Aviation Safety Network is an exclusive service provided by:
Quick Links:

CONNECT WITH US: FSF on social media FSF Facebook FSF Twitter FSF Youtube FSF LinkedIn FSF Instagram

©2024 Flight Safety Foundation

1920 Ballenger Av, 4th Fl.
Alexandria, Virginia 22314