As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CYLINDER REMOVED FROM ENGINE DUE TO ALUMINUM IN OIL SCREEN. FOUND PIN PLUG SHAVED COMPLETELY OFF ON NR 3 CYLINDER ALLOWING PIN TO RUB AGAINST CYLINDER WALL. THESE TYPES OF PIN PLUGS ARE A LOOSE FIT UNLIKE SUPERIOR AIR PARTS, INC., STYLE AND WERE INSTALLED WITH CORRECT LYCOMING PART NUMBER AND FIT. REMAINING PIN PLUGS SHAVED ALSO.