As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON CLIMB-OUT, PILOT REPORTED THE ENGINE STARTED TO LOOSE POWER. PILOT RETURNED TO POINT OF DEPARTURE. POST-FLIGHT INSPECTION REVEALED THE NR 9 CYLINDER HAD SEPARATED. THE NR 9 CYLINDER WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.