As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, NUMBER 1 ENGINE OIL TEMP INDICATOR ENTERED YELLOW RANGE FOR 14 MINUTES. AIRCRAFT RETURNED TO LAS AND MADE AN UNEVENTFUL LANDING. INSPECTED AND FOUND NR 1 ENGINE OIL TEMP SENSOR CANNON PLUG PIN B BROKEN. REPLACED PIN AND PERFORMED ENGINE POWER ASSURANCE RUN PER BOEING MM.