As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 814 - EN ROUTE TUL-ORD, DURNG CRUISE, AUTO CONTROLLER FAILED PRIOR TO SWITCHING MANUALLY TO STANDBY MODE. CABIN OXYGEN MASKS WERE DEPLOYED. LANDED ORD WITHOUT FURTHER INCIDENT. TROUBLESHOT SYSTEM AND COULD NOT DUPLICATE ON GROUND. PRECAUTIONARY REPLACED CABIN PRESSURE CONTROL PANEL. SYSTEM GROUD CHECKED NORMAL OPERATION. (M)