Incident Description
The pilot reported that the touchdown on runway 35 was smooth and uneventful. However, during the subsequent wheel landing, when forward pressure was applied to 'stick' the aircraft, the airplane unexpectedly turned hard right to an easterly heading. The pilot then added power in an attempt to regain control, but the airplane continued turning right to a westerly heading, exited the runway surface, and nosed over.
Weather Conditions
At the time of the incident, winds were reported from 060 degrees at 8 knots.
Aircraft Damage
Examination of the aircraft revealed that the right main landing gear was fractured in two locations. Analysis of the fracture surfaces showed signatures consistent with overstress separation.
Pilot Statement
In his report, the pilot indicated that the landing was initially smooth, and the unexpected yaw occurred after applying forward control pressure. Despite adding power, the airplane could not be corrected, leading to the runway excursion and subsequent nose-over.