As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - FLIGHT 4340, RECEIVED A YAW DAMPER INOP STATUS MESSAGE, PITCH FEEL FAULT STATUS MESSAGE, AUTOPILOT FAILURE, AND PFD AND MFD FAILURES (RED X) ON FO SIDE. RETURNED TO THE FIELD AND ACCOMPLISHED A UNEVENTFUL LANDING. MAINTENANCE REPLACED THE NR 2 INERITAL REFERENCE SYSTEM. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.