As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ANNUAL INSPECTION, I WAS BORESCOPING TCM TSIO 550 K ENGINE AND FOUND NUMBER 2 CYLINDER INTAKE VALVE CRACKED AND THE EDGES WERE CHIPPED AWAY. THE CYLINDER ONLY HAD 220 HOURS SINCE OVERHAUL. I REMOVED THE CYLINDER ASSEMBLY AND SENT TO CONTINENTAL ENGINES FOR REPAIR.