As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TUL- FLIGHT 4202 RECEIVED A ELEVATOR SPLIT CAUTION MESSAGE. RETURNED TO THE FIELD AND ACCOMPLISHED A UNEVENTFUL LANDING. THE AIRCRAFT WAS FERRIED TO DENVER WHERE THE NR 1 DATA CONCENTRATOR WAS REPLACED. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.