What was found
DECLARED EMERGENCY, INFLIGHT SHUT DOWN, AIR TURNBACK. DURING CRUISE NR 2 ENG OIL TEMP IN YELLOW BAND, C/W QRH, OIL TEMP STILL IN YELLOW BAND, MOMENTARLY IN RED BAND, SHUT DOWN NR 2 ENG. REMOVED AND REPLACED NR 2 ENG OIL TEMP BULB PER MM.