As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT PERFORMED AN AIR RETURN BACK TO MEM FOR NLG STEERING INOP MSG IN FLIGHT. AIRCRAFT LANDED SAFELY AND PILOT RE-ENGAGED STEERING AFTER LANDING AND TAXIED TO THE GATE. CREW DID DECLARE AN EMERGENCY. AIRCRAFT IS STILL OUT OF SERVICE IN MEM HANGAR.