What was found
HAD ZONE TEMP LIGHT FOR CONTROL CABIN AND FWD CABIN ON RECALL. RESETS WITH MASTER CAUTION. ACFT GROUNDED. PERFORMED CABIN TEMP CONTROLLER BITE TEST ON BOTH RT AND LT BITE BOXES, REF FIM 21-61, TASK 801. FOUND ALL CABIN TEMP SENSOR FILTERS DIRTY. R & R FLIGHT COMPARTMENT, FWD AND AFT PASSENGER COMPARTMENT TEMP SENSOR FILTERS, REF AMM 21-61-06.