What was found
AIR TURN BACK. DURING CLIMB RECEIVED ECAM MESSAGE FOR ENG BLEED 1 FAULT FOLLOWED BY PACK FAULT THEN NR 2 ENG BLEED FAULT FOLLOWED BY PACK FAULT. RETURNED WITHOUT FURTHER INCIDENT. MX REMOVED AND REPLACED NR 1 AND NR 2 BMC. REMOVED AND REPLACED NR 1 ENGINE HP VALVE. REMOVED AND REPLACED NR 1 ENGINE PRESSURE REGULATING VALVE. PERFORMED POWER ASSURANCE RUNS. POWER ASSURANCE RUNS WERE GOOD. REMOVED AND REPLACED NR 1 AND NR 2 ENGINE FAN AIR VALVE CONTROL THERMOSTAT. REMOVED AND REPLACED NR 2 BLEED PRESSURE REGULATOR VALVE CONTROL SOLENOID. COMPLIED WITH FUNCTIONAL TEST OF OVERPRESSURE VALVE. ALL MX ACCOMPLISHED IAW AIRBUS MM. OPERATIONAL CHECKS GOOD.