As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 2012 - AFTER TAKEOFF DFW WHEN LANDING GEAR RETRACTED, NLG DID NOT RETRACT. AIRCRAFT RETURNED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED NLG PRIORITY VALVE. ACCOMPLISHED LANDING GEAR RETRACTION CHECK WITH NO DEFECTS FOUND. SYSTEM GROUND CHECKED NORMAL OPERATION. (X)