On 4th August 1989 following a "competition finish" the pilot pulled up into a normal circuit at Sutton Bank. However, he mistook the flap lever for the airbrake and had to resort to a sideslip approach (still not realising his error). The glider floated and the pilot decided to fly onto the ground and ground loop rather than go over the ridge at the end of the airfield. The glider landed but was damaged at 15.30hrs.
Pilot - Name unknown.