As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
KOA/HNL - FLT 481 - PILOT REPORT: 4 LOUD THUMPS FOLLOWED BY LOSS OF PRESSURIZATION AT FL 220. BEGAN DESCENT AND DECLARED EMERGENCY. LANDING UNEVENTFUL. POST-FLIGHT INSPECTION SHOWS AFT CARGO DOOR SEAL BLOWN OUT. MAINTENANCE REPLACED AFT CARGO DOOR SEAL. LEAK AND PRESSURIZATION CHECK OK. (X)