What was found
APPROXIMATLY 35 MIN, AFTER TAKEOFF NR 3 ENG OIL PRESSURE/BYPASS LIGHT ILLUMINATED. ABNORMAL PROCEDURE ACCOMPLISHED, DETERMINED THAT BYPASS MODE WAS RESPONSIBLE AND ENGINE WAS SHUT DOWN AT 0835Z. PRESSURE AND QUANTITY WAS NORMAL PRIOR TO SHUT DOWN. WINDMILL TIME 1+28. REMOVED AND REPLACED NR 3 ENG OIL FILTER PER JT-8 B/M 71-02-01. REMOVED AND REPLACED NR 3 ENG L/P OIL SWITCH IAW B727 M/M 79-33-1. REMOVED AND REPLACED NR 3 ENG OIL BYPASS SWITCH IAW B727 M/M 79-33-2, CKS GOOD,JRH 5.2 P/N 7578678.