What was found
(CAN) A LARGE PIECE OF METAL RESEMBLING THE TIP OF A VALVE GUIDE WAS FOUND INSIDE THE VALVE COVER ON ONE OF THE CYLINDERS DURING A ROUTINE INSPECTION. FURTHER INVESTIGATION WITH A BOROSCOPE CONFIRMED THAT PART OF THE HYD LIFTER BODY HAD BROKEN OFF AND FOUND ITS WAY IN TO THE VALVE COVER. NO METAL WAS FOUND IN THE FILTER OR OIL SCREENS AND NO ABNORMAL TREND WAS FOUND IN THE PRECEEDING OIL SAMPLES. THE ENGINE IS BEING REMOVED FOR REPAIR.