What was found
MIA - FLT 1578 - DURING CLIMB-OUT FROM MIA EN ROUTE TO ATL, UNABLE TO CONTROL CABIN PRESSURIZATION. AIRCRAFT RETURNED TO MIA AND LANDED WITHOUT INCIDENT. REPLACED CONTROLLER. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
MIA - FLT 1578 - DURING CLIMB-OUT FROM MIA EN ROUTE TO ATL, UNABLE TO CONTROL CABIN PRESSURIZATION. AIRCRAFT RETURNED TO MIA AND LANDED WITHOUT INCIDENT. REPLACED CONTROLLER. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)