As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCO - FLT 1176 - CREW REPORTED A PRESSURIZATION PROBLEM OVER JAX. NEITHER AUTO STANDBY OR MANUAL WOULD STOP CABIN FROM CLIMBING. FLIGHT RETURNED TO FIELD AT MCO AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE TROUBLESHOT SYSTEM AND FOUND THE FORWARD OUTFLOW VALVE WORKS INTERMITTENTLY. REMOVED AND REPLACED FORWARD OUTFLOW VALVE. SYSTEM OPS CHECK GOOD. (X)