As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW INFLIGHT ORD-MEX. CREW REPORTED LOSS OF VERTICAL FUNCTION OF AUTO PILOT & V NAV INOPERATIVE. FLIGHT DIVERTED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED TOTAL AIR TEMPERATURE PROBE. SYSTEM GROUND CHECKED NORMAL OPERATION CLOSED.