As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)DURING A ROUTINE 'A' CHECK, MAINTENANCE PERSONNEL FOUND THE LEFT HAND ENGINE COMBUSTION CHAMBER CRACKED WHICH WAS 1 3/4" LONG IN THE AREA OF THE WELD FOR THE PLENUM DRAIN VALVE BOSS. RECTIFICATION INV OLVED REPLACING THE ENGINE FOR REPAIR.