What was found
DURING CRUISE, IDG OIL OUTLET FLASHING ADVISORY CAME ON NR 2 DISCONN START TEMP AROUND 135 DEG CELSIUS. AIR/OIL COOLER INOP. SECURE OPEN RAN ENG AT 85 PERCENT N1 TEMP AT 48C, DEFERRED OIL COOLER VALVE PER MEL 75-1B. *S/D* REMOVED AND REPLACED AIR/OIL HEAT EXCHANGE VALVE, LT CSD FUEL/OIL COOLER, IDG PER MM 24-11-24, 24-11-26, 24-11-11. LEAK CHECK GOOD.