What was found
RIGHT PACK LIGHT ILLUMINATES ON RECALL. GROUNDED - YES. PERFORMED PZTC BITE IAW B737-800 FIM 21-62 TASK 801. RH #2 PZTC HAD RED LT ON BIT AND PREV FOR RAM ACT AND TCV. RAN AGAIN, SAME RESULT. PERFORMED CABIN INDICATION TEST IAW B737-800 AMM 21-61-00-700-807-002. CHECKS GOOD. RAN BOTH PACKS AND RH INDEPENDENTLY FOR 15 MINS. RE RAN BITE, NO FAULTS, GREEN ON VERIFY. REMOVED AND REPLACED RH PACK TCV AS PRECAUTIONARY DUE TO HISTORY, IAW AMM 21-51-10-000/400-801. LEAK CHECKS GOOD, RE RAN CABIN INDICATION TEST, CHECKS GOOD. RE RAN PZTC BITE, NO FAULTS.