As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER PUSHBACK ZONE TEMP FOR CONTROL CABIN ILLUMINATED. RESET ON MASTER CAUTION. ACFT GROUNDED. PERFORMED A PACK TEMP CONTROLER BITE CHECK IAW FIM 21-62, TASK 801. NR 2 PACK TEMP CONTROLLER FAULTED CONTROL CABIN TRIM VALVE. RESET, RAN BITE CHECK AGAIN & NO FAULTS. RAN PACKS FOR HALF AN HOUR, NO RECURRING FAULTS NOTED.