What was found
INSPECTION OF THE OIL FILTER DURING ROUTINE OIL CHANGE FOUND 2 EA (.1250 INCH) DIAMETER PIECES OF ALUMINUM. FURTHER DISASSEMBLY OF THE ENGINE/ CYLINDERS FOUND THE NR 1 CYLINDER PISTON SKIRT WAS MISSING A SECTION (.5 INCH X 1.1250 INCH LONG). PERFORMED A DY PENETRANT INSP TO THE OTHER PISTONS. 3 WERE CRACKED AT THE SAME LOCATION. 1 HAD INDICATION OF POSSIBLE CRACK AND 1 WAS IN SERVICEABLE CONDITION. NO OTHER DAMAGE TO THE PISTON WAS DIAMETER WAS WITHIN SERVICE LIMITS. CYLINDER DIAMETER WAS WITHIN SERVICE LIMITS. (K)