What was found
(CAN) A/C WAS IN CRUISE WHEN THE NR 1 ENGINE OIL FILTER BYPASS LIGHT ILLUMINATED. CHECKLIST WAS ACCOMPLISHED, POWER LEVER RETARDED, AND OIL PRESSURE DECREASED WITH POWER DECREASE. LOW OIL PRESSURE LIGHT CAME ON AND ENGINE WAS SHUTDOWN. A/C CONTINUED TO DESTINATION AND HAD AN UNEVENTFUL LANDING. TROUBLESHOOTING AND MAINTENANCE CURRENTLY BEING ACCOMPLISHED, ENGINE IS BEING CHANGED. A FULL TEARDOWN REPORT AND FOLLOW UP WILL TAKE PLACE AS INFORMATION IS RECEIVED.