As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 CYLINDER EXHAUST VALVE STUCK HARD AT FULL LIFT POSITION. REMOVED CYLINDER. FOUND CYLINDER HEAD CRACKED AND WAS BEYOND REPAIR. CYLINDER ASSY HAD 286 HRS OPERATION SINCE LAST REMOVAL AND SERVICE. CYLINDER ASSY HAD 999.6 HRS TT. CYLINDER ASSY WAS REPLACED WITH AN NEW AEC ASSY STC SS SE10129SC.