As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NDT SERVICE WAS CONTRACTED TO VERIFY CRACKS IN THE ENGINE CYLINDER HEADS BETWEEN THE SPARK PLUG AND FUEL INJECTOR MOUNTING BOSS. AN EDDY CURRENT EXAMINATION DETERMINED THAT ALL TWELVE CYLINDER HEADS WERE CRACKED. THE OPERATOR REPLACED ALL TWELVE CYLINDER HEADS WITH FRESH OVERHAULED HEADS. AN EDDY CURRENT EXAMINATION DETERMINED THAT FIVE OF THE TWELVE OVERHAULED HEADS WERE CRACKED IN THE SAME LOCATION.