As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER STARTING BOTH ENGINES & PUSHING THE RECALL BUTTON, WE NOTICED A MASTER CAUTION CONT CAB ZONE TEMP LIGHT. WE RAN THE CHECKLIST FOR THIS LIGHT & CALLED MX CONTROL. WE THEN EXECUTED A FLIGHT CREW PLACARD. ACFT GROUNDED. NR 2 TEMPERATURE CONTROLLER LOGGED FLIGHT DECK TRIM VALVE. PERFORMED BITE, SYSTEM TESTED GOOD, FAULT RESET.