What was found
(CAN) THE NR 2 ENGINE OIL PRESSURE DROPPED BELOW 80 PSI ON FLIGHT. THE POWER WAS REDUCED AND THE AIRCRAFT LANDED. POST-FLIGHT INSPECTION FOUND OIL ON THE ENGINE COWLING. IT WAS DETERMINED THAT THE OIL WAS LEAKING FROM THE FUEL PUMP DRAIN. THE NR 2 ENGINE FUEL PUMP DRIVE SEAL WAS FOUND DEFECTIVE. A NEW SEAL WAS INSTALLED AND THE OIL LEVEL REPLENISHED. AN ENGINE GROUND RUN WAS CARRIED OUT AND THERE WERE NO LEAKS.