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, CYLINDER NR 4 DIFFERENTIALS WERE FOUND SATISFACTORY LIMITS. UPON FURTHER INSPECTION AFTER REMOVAL OF THE NR 4 CYLINDER, NR 4 INTAKE AND NR 3 EXHAUST LOBE ON CAMSHAFT DISPLAYED SIGNS OF PREMATURE WEAR. ENGINE WAS THEN REMOVED FOR REPAIR.