As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - INFLIGHT MKE-DFW. CREW REPORTED DIFFICULTY CONTROLLING CABIN PRESSURE AFTER TAKEOFF. CREW STATED THEY WERE IN MANUAL AND DID NOT EXPERIENCE ANY PACK PROBLEMS AND FLOW LIGHT WAS NOT ILLUMINATED. EMERGENCY DECLARED FLIGHT DIVERTED ORD LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED NUMBER TWO PRESSURE CONTROLLER. SYSTEM GROUND CHECK NORMAL OPERATION.