As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT DECK CREW INCREASINGLY COLDER DURING FLT. TEMP IN THE LOW TO MID 50'S. 'CONT CAB' TEMP CONTROL ON W, WITH DUCT TEMP INDICATING 28 DEGREES. FA'S REPORT AFT CABIN 80+ DEGREES. FWD CABIN TEMP CONTROL AT 9 0'CLOCK POSITION AND INDICATING 24 DEGREES. AFT CABIN TEMP CONTROL AT 8 O'CLOCK POSITION AND AFT TEMP INDICATING 20 DEGREES. GROUNDED - YES. REF LOG 11814866 REMOVED AND REPLACED CONT CAB TRIM AIR VALVE.