As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO PRESSURIZE. SAME RESULT IN MANUAL MODE; SAME RESULT W/ALL ITEMS IN EIA CHECKLIST; F/A REPORTS LOUD AIR NOISE FROM AFT PAX DOOR; NO "FAULT" ON PRESS CONTROLLER. REMOVED AND REPLACED AFT CARGO DOOR SEAL IAW AMM TASK 52-31-26-000-801 AND TASK 52-31-26-400-801. FUNCTIONAL CHECK GOOD. PRESSURIZATION TEST PER AMM TASK 21-00-00-863-801. PRESSURIZATION CHECKED GOOD. NO DEFECTS NOTED. RETURNED TO SERVICE.