What was found
ON TAKEOFF NR 1 ENGINE OIL BYPASS LIGHT CAME ON. BROUGHT THROTTLE BACK TO IDLE, ALL INDICATIONS NORMAL. AFTER CRUISE THROTTLE WAS MOVED FROM IDLE AND OIL TEMP CLIMBED WITH THROTTLE MOVEMENT. THROTTLE RETARDED AND SHUT ENGINE DOWN FOR PRECAUTION. WHEN AIRCRAFT ARRIVED, PULLED ENGINE OIL FILTERS. FOUND EXCESSIVE METAL IN SCREEN, SENT OIL OUT FOR ANALYSIS. RESULTS INDICATE BEARING FAILURE. REMOVED AND REPLACED NR 1 ENGINE.