What was found
MIA - CAPTAIN UNABLE TO MAINTAIN PRESSURIZATION AFTER TAKEOFF. RETURNED TO MIA WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND AFT OUTFLOW VALVE FAULTING. REPLACED VALVE. SYSTEM GROUND CHECK NORMAL OPERATION.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
MIA - CAPTAIN UNABLE TO MAINTAIN PRESSURIZATION AFTER TAKEOFF. RETURNED TO MIA WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND AFT OUTFLOW VALVE FAULTING. REPLACED VALVE. SYSTEM GROUND CHECK NORMAL OPERATION.