As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOLLOWING REMOVAL OF CYLINDERS FOR REPLACEMENT DUE TO LOW COMPRESSION, LIFTERS WERE REMOVED FOR INSPECTION. FOUND NR 1 CYL EXHAUST LIFTER BADLY PITTED AND SPALLED ON PTCE AND CHIPPED ON EDGES. DAMAGE TO CAMSHAFT OCCURRED AS A RESULT. ENGINE REMOVAL FOR REPAIR WILL BE NECCESSARY. LIFTER PN 653877.