What was found
PRESSURIZATION, PASSING 27,000 ON CLIMB OUT-ECAM AIR BLEED 1 AND AIR PACK 1 FAULTS COMPLETED ECAM PROCEDURES BUT CABIN PRESSURE STARTED TO RISE, EVENTUALLY GETTING TO 9700 DURING EMERGENCY DESCENT. GOT ECAM FOR EXCESSIVE CABIN (CONTINUED FROM ABOVE) ALTITUDE. CABIN PRESSURE CONTROLLER STAYED ON SYSTEM 1 THE ENTIRE TIME. CABIN PRESSURE DID NOT RETURN TO NORMAL UNTIL 1000 ON DESCENT. POST LANDING, OUTFLOW VALVE OPENED NORMALLY. PER TSM 21-31-00-810-068-B PERFORMED GVI OF A/C DUCTS/BLEED SYS. PERFORMED PRESSURIZATION TEST WITH APU BLEED, ENG 1 BLEED, AND ENG 2 BLEED. ALL SYSTEMS OPERATING NORMAL. VERIFIED CORRECT FUNCTION OF TOILET SYS. PERFORMED GVI OF CARGO DOOR SEALS, OUTFLOW VALVE SEALS, PASSENGER DOOR SEAL, AND AVIONICS COPARTMENT SEALS PER A 319 AMM 52-30, 21-31, 52-10, 52-41. ALL CHECKS GOOD. REF LOG 1889026 AND 9192725 FOR FURTHER CORRECTIVE ACTION ACCOMPLISHED BY MCC GUIDANCE. A/C OK FOR CONT SERVICE. (LP: 9192722, AIRCRAFT WAS GROUNDED)