What was found
AIRCRAFT DIVERTED TO MSP DUE LOSS OF OIL QUANTITY. DURING CRUISE, THE RIGHT ENGINE OIL QUANTITY STEADILY DROPPED FROM 16 QTS TO 0 QTS WHILE THE OIL TEMPERATURE AND PRESSURE REMAINED NORMAL. THE ENGINE SHUT DOWN WHEN LOW OIL PRESSURE LIGHT ILLUMINATED BUT WINDMILLED FOR APPROXIMATELY 10 MINUTES WITH ENGINE BELOW 10 PSI AFTER PREVIOUS ENGINE SHUTDOWN. MAINTENANCE SERVICED RIGHT ENGINE WITH 17 QTS OF OIL. RAN ENGINE WITH OIL COMING OUT OF DRAIN MAST. DISCONNECTED AFT DRAIN LINES FROM MAST AND FOUND OIL COMING FROM THE FUEL PUMP/FUEL CONTROL CARBON SEAL. REPLACED THE FUEL PUMP AND CARBON SEAL. PERFORMED WINDMILL INSPECTION. OPERATIONAL CHECK NORMAL.