What was found
FOUR HOURS INTO FLIGHT, NR 3 OIL QTY WENT TO ZERO, OIL PRESSURE DECREASED TO CAUTION RANGE. SHUTDOWN ENGINE WITH ZERO QUANTITY AND OIL PRESS 20 PSI, AFTER SHUTDOWN OIL PRESS WENT TO ZERO. FOUND NR 3 ENGINE STARTER FAILED AND SHAFT SEAL ROLLED OFF. REMOVED AND REPLACED NR 3 STARTER AND START VALVE, SYS OPS AND LEAK CHECK GOOD.