As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 358 PIT-PHX - EMERGENCY LANDING - CREW REPORTED CABIN PRESSURIZATION INOPERATIVE DURING CLIMB. WILL NOT WORK WITH CABIN PRESSURE CONTROLLER 1 OR 2 MANUAL SYSTEM. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO PIT. MAINTENANCE REMOVED AND REPLACED THE OUTFLOW VALVE. OPERATIONAL CHECK OF AUTO AND MANUAL PRESSURE CONTROL AND MONITORING SYSTEM GOOD.