As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTROLLER IN CABIN DOES NOT WORK RIGHT IN AUTO. IN FULL COLD POSITION SUPPLY DUCT TEMP REACHED 60 C. ACFT GROUNDED. PERFORMED FIM TASK 21-61-861, NO FAULTS FOUND. PERFORMED BITE TEST ON BOTH TEMP CONTROLLERS IAW MM 21-61-801, NO FAULTS FOUND. INSPECTED ALL 3 CABIN AND COCKPIT TEMP SENSOR FILTERS, ALL CLEAN. ALL SYS ON P5-17 PANEL OPERATE NORMAL.