As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON MC RECALL - FLT DECK ZONE TEMP ILLUMINATED . RESET ON MC RECALL. TEMP SELECTOR OPERATED NORMALLY. GROUNDED - YES. PERFORMED BITE PROCEDURE REF B737-900 AMM 21-51-00, FLT DECK TRIM VALVE LT ILLUMINATED ON BOTH CONTROLLERS. REMOVED AND REPLACED FLT DECK ZONE TRIM AIR VALVE, LEAK AND OPS CHK GOOD REF AMM 21-61-21 AND AMM 21-51-00.