As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND (2) ECI CYLINDERS CRACKED. CYLINDERS ARE CRACKED BETWEEN THE 17TH AND 18TH FIN AS LOOKING AT CYLINDER INSTALLED FROM THE BARREL TO THE HEAD, IN THE EXHAUST CHAMBER AREA. FOUND BY DOING COMPRESSION. LET ENGINE COOL OFF AND SOAP LEAK TEST. REMOVED THE REMAINING CYLINDERS AND FOUND THAT THE EXHAUST VALVE AREA ARE VERY LEAD FOULED. CUSTOMERS FLIES PLANE 75 DEGREES RICH OF PEAK. (K)