Loss of control Accident de Havilland Canada DHC-1 Chipmunk Mk 22 HB-TUI, Saturday 3 May 1975

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Date:	Saturday 3 May 1975
Time:	12:41
Type:	de Havilland Canada DHC-1 Chipmunk Mk 22
Owner/operator:	Segelfluggruppe Cumulus
Registration:	HB-TUI
MSN:	CI-0208
Year of manufacture:	1951
Total airframe hrs:	7659 hours
Fatalities:	Fatalities: 1 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Destroyed
Category:	Accident
Location:	Schaffhausen Airfield - Switzerland
Phase:	Approach
Nature:	Banner and glider towing
Departure airport:	Schaffhausen Airfield
Destination airport:	Schaffhausen Airfield
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
On Saturday, 3 May 1975, the tow pilot performed tow flights with the Chipmunk Mk 22, HB-TUI, at Schaffhausen Airfield.
While initiating the landing turn in a gusty wind, the aircraft tipped over from a height of around 60 m agl and crashed at 1241 hrs.
The pilot was killed and the tow plane was destroyed. There was minor land damage.

Cause of the accident;
- Inappropriate flight tactics;
- Undercutting the minimum airspeed during a landing turn flown with a large bank angle.

Accident investigation: