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 ILLUMINATED DURING MASTER CAUTION RECALL. RAN QRH, LIGHT WENT OUT. ACFT GROUNDED. BITE CHECKED NR 2 ZONE TEMP CONT, SHOWS FLT DECK TRIM VALVE FAULT IAW FIM 21-61 TASK 861. REPLACED CONTROL CABIN TRIM AIR MODULATING VALVE IAW AMM 21-61-21-00-801 AND 21-61-21-400-801 UP TO STEPS 3F (4) BITE TEST CHECKED GOOD.