As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, EN ROUTE FROM ORD TO CLT AT FL320, CREW REPORTED ENCOUNTERED A PRESSURIZATION FAILURE. FLIGHT DESCENDED TO FL190 TO REGAIN CONTROL OF CABIN. NO OXYGEN MASKS WERE DEPLOYED. FLIGHT CONTINUED AND LANDED AT CLT WITHOUT FURTHER INCIDENT. AN EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED THE CABIN PRESSURE CONTROLLER. OPERATIONAL CHECK GOOD PER MM 21-31-00.