As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND LOW COMPRESSION (30/80) DURING NORMAL MAINT INSPECTION. REMOVED CYL AND FOUND .009 INCH WEAR AT PORT END OF EX GUIDE AND .002 INCH WEAR ON VALVE STEM. THIS WAS A LYCOMING FACTORY NEW CYL KIT INSTALLED DURING RECENT MAJOR OVERHAUL.