What was found
JUST AFTER LEVEL OFF, DURING CRUISE, RECEIVED A ZERO OIL PRESSURE INDICATION ON THE NR 1 ENGINE, RETURNED TO DEN, ALL OTHER ENGINE INDICATIONS WERE NORMAL. EEC 1 FAULT CODE 79-11091 PRESENT ON FLIGHT LEG 0 & 1. REMOVED AND REPLACED J7 & J8 FAN WIRING HARNESS' IAW AMM 73-21-06. R & R THE NR 1 ENG OIL PRESSURE SENSOR IAW MM 79-32-01. COMPLETED THROUGH PARA H. COMPLETED THE INSTALLATION OF THE NR 1 ENG OIL PRESSURE SENSOR IAW AMM 79-32-01. COMPLETED IDLE LEAK CHECK AND TAKE OFF POWER ASSURANCE TEST IAW EA 22-179-03514. LEAK CHECKED AND OPS TESTED GOOD.