As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK, NR 1 ENG OIL TEMP INDICATED 165 DEGS. ATTEMPTED TO REDUCE TEMP BY REDUCING POWER, NO EFFECT. DURING DESCENT OIL TEMP INDICATION BECAME ERRATIC, THEN STABILIZING TO 120 DEG. REMOVED AND REPLACED NR 1 ENG OIL TEMP IND AND OIL TEMP BULB PER MM.