As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: SPEED TRIM FAIL LIGHT ANNUNCIATED IN CLIMBOUT. EMERGENCY DECLARED; FLIGHT RETURNED TO CLT LANDING SAFELY. MAINTENANCE FOUND DIGITAL FLIGHT CONTROL SYSTEM (DFCS) FAULT CODES FOR AUTO STAB TRIM CUTOUT, TRIM COMMAND RESPONSE FAIL, AND TRIM DOWN FAIL. REST STAB TRIM PER FIM TASK 22-15-00. SPEED TRIM LIGHT EXTINGUISHED.