What was found
(CAN) CREW NOTICED RT ENGINE OIL PRESSURE FLUCTUATING SLIGHTLY.- AFTER A PERIOD OF TIME THE OIL PRESSURE STARTED TO DECAY TO WHERE THE RED LOW OIL PRESSURE LIGHT ILLUMINATED (~25PSI).- A PRECAUTIONARY MANUAL SHUTDOWN WAS PERFORMED ON THE RT ENGINE (S/N P84403). - AN UNSCHEDULED LANDING WAS SAFELY COMPLETED AT WINNIPEG INTERNATIONAL AIRPORT.-UPON INSPECTION IT WAS OBSERVED THAT OIL HAD LEAKED OUT FROM THE BOTTOM (6 O'CLOCK) POSITION BETWEEN THE NR 6 BEARING OIL OUT TUBE FLANGE AND WHERE ATTACHMENT IS MADE TO NR 6 BEARING HOUSING.- CLEANED UP AREA AND COMPLETED SERVICE BULLETIN TFE731-79-3053 INSTALLING OIL OUT TUBE P/N 3075541-2 AND SEAL P/N M83248-1-015.