What was found
REPORT PILOT: 02.NOV.2021=> DURING DESCENT AT 20000 FT CAB HI ALT DOOR R AFT CABIN CAB PR LO DIFF PR CAB PR SAFETY VALVE OPEN
ACTION CORRECTIVE: 05.NOV.2021=> IN ACCORDANCE WITH AIRBUS CONSULT #80985779 THESE MM (FAULTS) WERE PRESENTED BY ERROR CONFIGURATION IN QNH. ADDITIONALLY IAW AMM35-21-41-04 CONG 00 THE CONTAINER EMERGENCY OXYGEN 226WR,225WR,223WR AND 241WR WERE REPLACED & AMM 35-21-05-04 CONG 00 THE GENERATOR 222WR WAS REPLACED. OPERATIONAL CHECK OF MASK RELEASE WAS PERFORMED IS SASTIFACTORY AS PER AMM 35-23-00-710-001-A