As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTROL CABIN ZONE TEMP LIGHT ILLUMINATES DURING MASTER CAUTION RECALL. ZONE TEMP LIGHT EXTINGUISHES WHEN MASTER CAUTION SYSTEM IS RESET. ACFT GROUNDED. NR 2 CONTROLLER LOGGED FLIGHT DECK TRIM VALVE. PERFORMED AMM TASK 21-61-00-700-806-002. SYSTEM TESTED GOOD. FAULT RESET.