As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FORWARD CABIN TEMPERATURE FLUCTUATES DRAMATICALLY WITH MINIMAL INPUT FROM CABIN CONTROLLER. ACFT GROUNDED. VERIFIED NO FAULTS ON PACK TEMP CONTROLLERS AND CLEANED LINT OUT OF FWD AND AFT CABIN TEMP SENSOR FAN FILTERS IAW MM 21-61-11. OPS NORMAL.