As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A 100 HR INSPECTION, METAL FILINGS WERE DISCOVERED IN THE OIL FILTER. CYLINDER 2 AND CYL NR 4 WERE REMOVED AND THE CAMSHAFT INSPECTED. MISSING METAL WAS DISCOVERED ON THE NR 2 CYL EXHAUST LOBE. IN ADDITION WERE AND PITTING HAVE BEEN OBSERVED ON THE HYD TAPPET FACE. ENGINE IS BEING REMOVED FROM SERVICE FOR OVERHAUL.