Incident Overview
During taxi for takeoff on a crowned grass airstrip, the pilot lost directional control when the airplane began moving sideways. The airstrip was bordered on both sides by ditches.
Sequence of Events
The right landing gear departed the edge of the airstrip and entered a ditch. The aircraft then struck a fence before proceeding into an adjacent pasture. During this excursion, the airplane rotated 90 degrees to the right before coming to a stop in an upright position.
Damage Assessment
Substantial damage was sustained to the underside of the right elevator, the left elevator and stabilizer, the right aileron, and the right outboard underwing area.
Conclusion
The incident occurred during taxi operations on a grass airstrip with geometric features that contributed to the loss of directional control and subsequent damage.