As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 50-HOUR INSPECTION, FOUND A FEW CHIPS IN OIL FILTER. 10 HOURS LATER, NO CHIPS FOUND. DURING 100-HOUR INSPECTION, AGAIN, SOME CHIPS. ENGINE CONTROLLED WITH A MORE DETAILED INSPECTION. FOUND CAMSHAFT CYLINDERS 3 AND 4 WORN OUT EXTREMELY. AIRPLANE WAS USED FREQUENTLY FOR GLIDER TOWING. (X)