As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE ENGINE WAS TOPPED WITH 6 ENGINE COMPONENTS INC CERMINIL CYLINDERS. AFTER 29 HOURS OF OPERATION, ENGINE RAN ROUGH AND WAS LOSING OIL. PILOT WAS ABLE TO FIND A PRIVATE STREET AND LANDED SAFELY. IT WAS DETERMINED THAT NR 4 CYLINDER WAS CRACKED .8750 INCH AROUND AND 5.4 INCHES DOWN LOOKING INTO THE BARREL. (X)