As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F-D COMPARTMENT SHOWS NO AMBER TEMP DEMAND SETTIING IN AUTO OR MANUAL. SWAPPED TRIM AIR MODULATING VALVES BETWEEN FLIGHT DECK AND C ZONE. F- D TEMP CONTROL AND INDICATION NORMAL. DEACTIVATED ZONE C TRIM AIR MODULATION VALVE TO CLOSED POSITION. REPLACED TRIM VALVE, OPS CKD OK.