As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE FROM CLE TO CLT, DURING CRUISE, CREW REPORTED THE CABIN ALTITUDE WARNING HORN SOUNDED AND NOTED THAT THE CABIN ALTITUDE WAS CLIMBING. CAPTAIN ADVISED ATC THAT THEY WOULD LIKE A LOWER ALTITUDE, THEN HE ADVISED THEY WOULD NEED TO DIVERT TO PIT. CABIN WAS PREPPED FOR A NORMAL LANDING. FLIGHT LANDED WITHOUT INCIDENT AT PIT. NO OXYGEN MASKS WERE DEPLOYED AND NO EMERGENCY WAS DECLARED. MAINTENANCE REPLACED THE CABIN PRESSURE CONTROLLER PER AMM 32-31-21-04. OPS CHECK OK.