What was found
AT FLIGHT LEVEL 370 GOT AN ECAM DUE TO HIGH CABIN PRESSURE, SHORTLY AFTER THAT THE NR 2 PRESSURE REGULATOR FAULTED, DONED OXYGEN MASKS STARTED A DECENT AND RAN THE ECAM. ALL PRESSURE REGULATING VALVES SHOWED CLOSED ON ECAM. THE CABIN PRESSURE CONTINUED TO CLIMB UNTIL IT MATCHED THE AIRPLANE ALTITUDE. COULD NOT GET THE PRESSURIZATION TO RECOVER. T/S PER TSM 36-11-00. NO CURRENT FAULTS OR LOGGED FAULT ON PNEU CONT 1 OR 2. SUSPECT PNEU CONT 2. R & R NR 2 PNEU CONT PER ABOVE REF. OPS CK GOOD. RAN BOTH ENGS PER JRH. #2 ENG BLEED AIR SYS OPS CK GOOD PER AMM 36-11-00-05-01. REF WRI: 21-50/8315. PREV MEL'ED #1 PACK WAS CLEARED. A/C OK FOR SERVICE.