As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CAB FWD & AFT CAB TEMPERATURE CONTROL KNOBS SMALL MOVEMENTS PRODUCE WILD TEMPERATURE SWINGS. CONTROL CAB WORST, IT KEEPS MOVING HIGHER IN TEMP AFTER A DEMEND SETTING FOR A LOWER TEMP. SUSPECT FILTERS FOR RESPECTIVE ZONE TEMP PROBES. GROUNDED - YES. FOUND ALL 3 TEMP SENSOR FILTERS CLOGGED RESTRICTING AIRFLOW. REMOVED AND REPLACED CONT, FWD & AFT TEMP CONTROL SENSOR FILTERS REF MM 21-61-06.NO HISTORY PAST 30 DAYS.