As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DESCENDING THROUGH 3500' HEARD A LOUD BOOM FOLLOWED BY THE PRESSURIZATION BECOMING ERRATIC. LANDING UNEVENTFUL.FOUND AFT CARGO DOOR SEAL DAMAGED. REMOVED DOOR SEAL IAW AMM TASK 52-31-26-000-801, INSTALLED AFT BAG DOOR SEAL IAW AMM TASK 52-31-26-400-801. FUNCTION TEST OF DOOR SEAL GOOD. RETURN TO SERVICE.