Incident Overview
An aircraft was landing at a private, sod airstrip with a narrow runway. At the time, it was raining and the runway was wet. The pilot performed an obstacle, short field approach to the 3000-foot-long runway at 70 knots with flaps fully deployed.
Landing Sequence
Upon touchdown, the flaps were not retracted as listed in the Pilot's Information Manual, and the yoke was held in the full aft position. The aircraft touched down slightly left of the centerline on the crowned runway. A left drift developed during the landing roll. Attempts to return to the runway centerline were unsuccessful. The aircraft subsequently drifted into tall grass and a ditch adjacent to the runway. It then nosed over, coming to rest inverted.
Operational Details
The approach and landing were conducted under rainy conditions with a wet runway surface. The airstrip's narrow width and crowned profile may have influenced directional control. The pilot's control inputs—full aft yoke and failure to retract flaps—were noted in the source. No further details about the aircraft type, registration, or occupants were provided in the source.