As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) ENGINE CYLINDERS (4OFF) HAD TOP PISTON RINGS DELAMINATING. PLASMA FACE SECTION COMING AWAY FROM BASE MATERIAL. ALL 4 CYLINDERS ALSO HAD EXCESSIVELY WORN EXHAUST VALVE GUIDES AND 2 EXHAUST VALVES REQUIRED REPLACEMENT. (CASA NR 510001642)