What was found
WE EXPERIENCED A CABIN DEPRESSURIZATION DURING DESCENT. MULTIPLE ECAM MESSAGES WERE RECEIVED. IN ORDER THEY ARE: VENT EXTRACT FAULT, VENT BLOWER FAULT, CAB PR EXCESS CAB ALT, VENT EXTRACT FAULT, VENT BLOWER FAULT, CAB PR SAFETY VALVE OPEN. / REF W/O 439476,NRT 820903,820946,820763. A/C OK FOR SERVICE AT THIS TIME."