What was found
AIRCRAFT WAS GROUNDED: AIRCRAFT RETURNED TO MIA DUE TO THE FLIGHT CREW REPORTING THAT IMMEDIATELY AFTER TAKEOFF RECEIVED CABIN PRESSURE SYSTEM 1 AND SYSTEM 2 ECAM FAULTS. THE FLIGHT CREW ACCOMPLISHED ECAM PROCEDURES BUT WERE UNABLE TO CONTROL PRESSURIZATION SYSTEM MANUALLY. SUBSEQUENTLY RECEIVED CABIN PRESSURE SAFETY VALVE OPEN INDICATION. THE AIRCRAFT LANDED SAFELY AT MIA WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE # 1 CABIN PRESSURE CONTROLLER 11HL (AALA202603118095) AND THE # 2 CABIN PRESSURE CONTROLLER 12HL (AALA202603117222) PER AMM 21-31-34. MAINTENANCE ALSO REPLACED CABIN PRESSURE SAFETY VALVE 6HL (AALA202603112750) AND CABIN PRESSURE SAFETY VALVE 7HL (AALA202603110719) PER AMM 21-31-00. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO FAULTS NOTED.