What was found
AT 25 HR OIL CHANGE, INTERVAL OIL WAS FOUND VENTING OUT THE RIGHT ENGINE OVERBOARD DRAIN AND THE OIL DRAINED FROM THE ENGINE HAD A METALLIC GLIMMER TO IT, ALTHOUGH CUTTING THE OIL FILTER DID NOT REVEAL ANY UNUSUAL AMOUNT OF METAL. OIL VENTING WAS TRACED TO ENGINE DRIVEN HYDRAULIC PUMP ACCESSORY DRIVE. PUMP AND DRIVE ASSY WERE REMOVED AND INSPECTED. PLAIN BEARING IN ADAPTOR HAD SEIZED TO THE DRIVE SHAFT AND WAS SPINNING IN THE HOUSING, GALLING AND DEPOSITING SIGNIFICANT AMOUNT OF BRONZE AND ALUMINUM INTO OIL SUMP THROUGH ACCESSORY CASE. GALLING PRODUCED ENOUGH HEAT TO MELT REAR SHAFT SEAL WHICH WAS WHY OIL HAD STARTED VENTING OVERBOARD. PARTS WERE ALL REPLACED WITH NEW AND ENGINE, ACCESSORIES FLUSHED