What was found
PISTON PIN PLUG IN CYLINDER NR 2 FAILED CATASTROPHICALLY ENLARGING PISTON BOSS AND WEARING INTO LOWER RING. ENGINE WAS 800 SMOH, CYLINDERS .010 INCH OS (PLAIN STEEL). SCREEN LAST CHECKED 48 HOURS PREVIOUSLY. PRESSURE SCREEN BECAME PLUGGED WITH ALUMINUM FLAKES, OIL PRESSURE DROPPED AND PILOT NOTICED CHANGE. ALL OTHER CYLINDERS REMOVED. TWO OTHER PLUGS WORN BEYOND LIMITS. REPLACED ALL PISTON PIN PLUGS WITH LYC PN 72198. (X)