As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CYLINDER CRACKED THROUGH 75 PERCENT OF CIRCUMFERENCE AT CYLINDER CROWN FROM A POINT BEYOND THE UPPER SPARK PLUG HOLE, AROUND THE EXHAUST VALVE, AND TERMINATING AT A POINT BEYOND THE LOWER SPARK PLUG HOLE (BUT NOT TRANSECTING THE HOLE).