What was found
(CAN) THE PILOT REPORTED THAT 5 MINUTES AFTER TAKEOFF DURING CLIMB HE FELT A SLIGHT VIBRATION AND THE OIL PRESSURE WENT MOMENTARILY IN TO THE YELLOW RANGE. THE PILOT MADE RIGHT TURN TO RETURN TO HOME BASE WITH THE LOP WARNING LLUMINATED AND A GROWL NOISE BEING HEARD. DURING APPROACH TO BEAUFORT, NC AIRPORT, THE OIL PRESSURE WAS LOST AND THE PROP FEATHERED. AN UNEVENTFUL LANDING WAS PERFORMED. THE ON GROUND INSPECTION FOUND NO EXTERNAL OIL LEAKS, WITH THE MAIN OIL TANK FULL. THE MAIN OIL FILTER AND CHIP DETECTOR WERE FULL OF METAL DEBRIS. THE PROP SHAFT WAS SEIZED. THE ENGINE WAS REMOVED AND SENT FOR REPAIR.