As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEVEL AT FL320 ENROUTE TO JNU RECEIVED MASTER CAUTION AND TEMP PROBE FOLLOWED QRH AND RETURNED TO SEA. GROUNDED - YES. AIR TURNBACK. DIVERSION TIME 78 MINUTES - TROUBLESHOT AND FOUND TAT PROBE TO BE FAILING REPLACED TAT PROBE PER AMM 34-21-06 AND OPS CHECKED GOOD.