As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OKC - ON FLIGHT 4165, AFTER DEPARTING DENVER CREW RECEIVED AN AUTOPILOT TRIM INDICATOR NOSE DOWN MESSAGE ON NR 1 MFD. CREW COMPLIED WITH EMERGENCY/ABNORMAL CHECKLIST AND NO FURTHER PROBLEM WERE ENCOUNTERED. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND NO MESSAGES POSTED. OPERATIONAL TEST OF ELEVATOR SERVO WERE PERFORMED AND NO DEFECTS WERE NOTED. AIRCRAFT RETURNED TO SERVICE.