As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT AND SELECTING MASTER RECALL THE COCKPIT ZONE TEMP ILLUMINATES. GROUNDED - YES. NR 2 ZONE TEMP CONTROLLER LOGGED "TRIM VALVE" FLT DECK FAIL. PERFORMED ZONE TEMP CONTROLLER BITE TEST REF AMM TASK 21-61-00-700-806-002. RESET FAULT OP'S CHECKED NORMAL.