As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A SCHEDULED 50 HOUR OIL CHANGE. STEEL WAS FOUND IN OIL SCREEN. SUSPECTED SOURCE OF STEEL WAS COMING FROM LIFTERS. INSPECTED NR 5 CYLINDER LIFTERS THROUGH OIL FILLER NECK AND FOUND DAMAGED LIFTERS. REMOVED LIFTERS FROM ENGINE. ALL INTAKE LIFTERS WERE DAMAGED AND 1 CNT. EXHAUST LIFTER WAS DAMAGED. 400 HOURS. TIME IN SERVICE SINCE NEW FOR BOTH THE CAM AND LIFTERS. ONE YEAR IN SERVICE.