As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH 16000 FT VNAV DISCONNECTED. TAT TEMP WAS CLIMBING TO 99 DEGREE AND TO 15 DEGREE CAUSING AT LIM ANNUNCIATOR INTERMITENTLY. ALL ASSOCIATED SYSTEMS WORKED INTERMITENTLY ON RETURN TO SEA. NO MASTER CAUTION OBSERVED. LOSS OF AUTHTHROTTLES VNAV FCC1. GROUNDED - YES. AIR TURNBACK - REPLACED TOTAL AIR TEMPERATURE PROBE (TAT). PERFORMED GOOD INSTALLATION TEST. REF B737-9 AMM 34-21-06/401.