As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CLIMB THE PILOT NOTICE A LOSS OF POWER AND ENGINE VIBRATION. RETURNED TO BASE. MAINTENANCE FOUND NR 3 CYLINDER CRACKED AT THE EXHAUST VALVE. THIS IS THE 3RD CYLINDER ON 2 DIFFERENT ENGINES TO CRACK IN THIS PLACE. ALL CYLINDERS REMOVED AND RETURNED TO SUPPLIER. OVERHAULED CYLINDERS INSTALLED AND AIRCRAFT RETURNED TO SERVICE.