As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING RECALL ON AFTER START CHECKLIST CONT CAB ZONE TEMP AND AIR CONDITIONING MASTER CAUTION ILLUMINATED. ACCOMPLISHED QRH, OPS NORMAL. PRIMARY COCKPIT TEMP CONT INOP. FOUND ZONE TRIM MOD VALVE BAD. INSTALLED NEW VALVE, OPS CHECKED GOOD. NO FAULTS FOUND.