As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE INVESTIGATING PROBLEM OF LEAKING EXHAUST VALVE CYLINDER NR 6. A CHECK OF THE VISABLE CAMSHAFT INDICATED SEVERE SPALLING ON CAM FOLLOWER FOR NR 5 CYLINDER. CHECK OF OIL SCREEN SHOWED NO METAL. CHECK OF OIL SCREEN WELL REVEALED METAL. AIRCRAFT HAS BEEN INACTIVE DURING THE PREVIOUS 9 MONTHS. STORED IN A HEATED HANGAR.