What was found
(CAN) DURING CRUISE FLIGHT THE FLIGHT CREW NOTICED A LOW OIL PRESSURE INDICATION ON THE NR 2 ENGINE. THE CHECKLIST WAS FOLLOWED AND THE NR 2 ENGINE WAS SHUTDOWN. THE FLIGHT CREW ADVISED MAINTENANCE AND FLIGHT OPERATIONS AND RETURNED. AN INSPECTION WAS COMPLETED AND IT WAS DETERMINED THAT THE LOW OIL PRESSURE WAS CAUSED BY AN OIL LEAK ON THE B SUMP OIL SCAVENGE LINE AT THE FLARED FITTING. AS A PRECAUTION THE NR 2 ENGINE WAS REPLACED. THE B SUMP OIL LINE WAS ALSO REPLACED.