As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEFERRAL DF708 IS OPEN FOR THE ZONE C TRIM AIR VLV BEING DEACTIVATED CLOSED IAW MEL2161J. CREW REPORT THE AREA AROUND ROW 10 IS STILL EXPERIENCING VERY HOT AIR COMING FROM THE FLOOR VENTS. RUNNING TEMP CONTROL IN MAN WITH THE TRIM AIR OFF RESULTED IN AN UNCOMFORTABLY COOL TEMPERATURE IN THE COCKPIT. REPLACED BROKEN AIR DUCT, REACTIVATED TRIM AIR VLV FOR ZONE C. RAN & LEAK CHECKED OK.