As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT THE AUTO PRESSURIZATION FAILED AFTER LANDING. THE MAINTENANCE TEAM DETERMINED THAT THE OUTFLOW VALVE FAILED. A REPAIRED UNIT WAS INSTALLED. OPS/LEAK CHECKS WERE PERFORMED AND FOUND TO BE SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE.