As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON DESCENT FLIGHT RECEIVED MULTIPLE FAULTS, PACK 2 REGULATOR FAULT, HOT AIR VALVE FAULT, AND AN EXCESSIVE CABIN PRESSURE MASTER WARNING. CREW FOLLOWED COM DECLARED AN EMERGENCY AND DID AN EMERGENCY DESCENT FROM FL230 TO FL100 AND LANDED IN MSY WITH NO FURTHER COMPLICATIONS. PACK 2 (FAILED IN FLIGHT) FLOW CONTROL VALVE R&R AND COMPRESSOR SENSOR 12HH.