As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ZONE TEMP LIGHT FOR CONT CAB RESET. ACFT GROUNDED. PERFORMED FIM 21-62 TASK 833. AFTER BITE TEST OF NR 2 PACK TEMP CONTROLLER. FOUND FOUND FAULT - FLT DECK TRIM VALVE. RESET FAULT AND RAN PACKS. CONTROL CABIN TEMP OPS NORMAL AND FAULT DID NOT RETURN. NO HISTORY 90 DAYS. CLEARS MEL 21-21F.