What was found
RIGHT PACK LIGHT ILLUM ON CLIMB, WOULD NOT RESET. ACFT GROUNDED. REMOVED AND REPLACED S939 RIGHT ACM OVERHEAT THERMAL SWITCH, IAW AMM 21-51-40, S5 RIGHT COMPRESSOR DISCHARGE OVERHEAT SWITCH, IAW AMM 21-51-41, S935 PACK DISCHARGE OVERHEAT SWITCH, IAW AMM 21-51-42. REMOVED AND REPLACED M1455 AIR CONDITIONING ACCESSORY UNIT, IAW AMM 21-51-02. OPS CHECK NORMAL. RT PACK/ZONE TEMP CONTROLLER FAULTS TCV DURING BITE. ACCOMPLISHED TEST MULTIPLE TIMES, FAULT REMAINS. REMOVED AND REPLACED RIGHT PACK TCV, IAW AMM 21-51-10. OPS CHECK NORMAL. RAN RIGHT PACK, NO PACK LIGHT.