What was found
COCKPIT TEMPERATURE WAS UNCONTROLLABLE IN NORMAL OR MANUAL MODE. COCKPIT DUCT TEMPERATURE REACHED A HIGH OF 241°F. CORRECTIVE ACTION: VERIFIED DISCREPANCY. VISUALLY INSP'D AIR VENTS FOR BLOCKAGE, NO DEFECT. INSP'D COCKPIT ECS ROTARY SWITCH FOR EXCESSIVE PLAY OR STICKING, NO DEFECT. GAINED ACCESS BENEATH ROTARY SWITCH AND INSP'D WIRING, NO DEFECT. GAINED ACCESS TO AFT EQUIP BAY AND INSP'D ECS COMPS/DUCTS FOR LOOSE CONNECTIONS, SIGNS OF AIR LEAK, OBVIOUS DAMAGE. NO DEFECT. PERFORMED ARES DOWNLOAD AND SENT TO TEXTRON WHO VERIFIED NO FAULTY ACM DATA PRESENT, AND RECOMMENDED STARTING WITH R/R OF RH TEMP CONTROL VALVE. REMOVED/REPLACED RH TEMP CONTROL VALVE PER CE 680A AMM 21-10-20 AND PERFORMED FOLLOW ON OPERATIONAL TEST. LEAK/OPCHECK GOOD.