As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT - FL 1090 - CAPTAIN REPORTED THAT HE HAD PRESSURIZATION CONTROL PROBLEMS. FLIGHT RETURNED TO CLT AND LANDED WITH NO FURTHER INCIDENT. THE AFT PRESSURIZATION CONTROLLER FAILED THE TAKEOFF TEST. AFT CONTROLLER C/B WAS PULLED. MAINTENANCE REPLACED THE AFT CONTROLLER. (M)