As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH FWD & CONT CABIN PACK CONTROLLERS IN 12:00 AFT CABIN CONTROLLER REQUIRED 4:00 POSITION TO MAINTAIN AFT CABIN TEMP AT 26 DEGS C. NO FAULTS LOGGED IN NR 1, 2 CONTROLLERS. FOUND AFT CABIN TEMP SENSOR FILTER CLOGGED. CLEANED FILTER. GROUND VERIFICATION PASSED. ACCOMPLISHED ZONE TEMP BITE CHECK. NO FAULTS LOGGED 1&2. RAN BOTH PACKS TEMP IN FWD AFT CABIN PAIRED UP AT ALL SETTINGS.