As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT LOST PRESSURIZATION, NOT PRESSURIZING, NO OUTPUT FROM PACK AT 24K FEET, DECLARED EMERGENCY & DESCENDED. CREW FOLLOWED QRH AND DEPLOYED MASKS. PASSENGER USED MASKS. REMOVED AND REPLACED LT PACK PRSOV AND BOTH PACK OVERPRESSURE SWITCHES IAW AMM. OPERATIONAL CHECK GOOD AT THIS TIME.