As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON A ROUTINE INSPECTION IT WAS FOUND THAT THE NR 5 CYLINDER HAD DEVELOPED A CRACK BETWEEN THE BARREL AND HEAD. THE SUPERIOR CYLINDER WAS R & R WITH A GENUINE CONTINENTAL CYLINDER. THE SYSTEM WAS GROUND FUNCTION CHECKED SERVICEABLE.