What was found
PACK TRIP OFF LIGHT LIGHT ON DURING CLIMB, LIGHT STAYS OFF AFTER RESET RIGHTAPPLYING MEL FAULT NUMBER 030. LO INFL/HI LEAKG IS DISPLAYED ON NR 2 CABIN PRESSURE CONTROLLER PACK TRIP 30 SECONDS AFTER TURNED ON. NO AIRFLOW FROM PACK EXHAUST SUSPECT BAD ACM. CREW REPORTED PROBLEMS ON INBOUND FLIGHT. MCDU ECS DESCRETES SHOWS RT PACK OFF. REMOVED AND STOWED D492 CONNECTOR. C SOLENOID VERIFIED IN. JUMPER NOT INSTALLED. REMOVED AND REPLACED ACM IAW AMM 21-51-04 UP TO STEP H 6, AND REINSTALLED LOW PRESSURE WATER SYSTEM MIX MUFF IAW AMM 21-51-09.