What was found
THE NR 2 ENGINE OIL QUANTITY DROPPED TO .5 GALLON WHILE EN ROUTE. THE NR 2 ENGINE WAS SHUT DOWN AND THE AIRCRAFT WAS DIVERTED TO BWI WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE NR 2 ENGINE OIL LEAKING FROM HYDRAULIC PUMP CAVITY DRAIN. THE CARBON SEAL IN GEARBOX BEHIND HYDRAULIC PUMP WAS REMOVED AND REPLACED. THE ENGINE WAS RUN AT HIGH POWER AND NO LEAKS WERE FOUND.