As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW INFLIGHT T1841/23AUG. CREW REPORTED NLG WOULD NOT RETRACT AND SPOILER INDICATION ILLUMINATED. RETURNED TO DFW AND LANDED WITHOUT INCIDENT. FOUND NLG FLAT WITH NO EVIDENCE OF FLUID LEAKING. REPLACED NLG STRUT, PISTON SEALS AND SCHRADER VALVE. SYSTEM GROUND CHECKED NORMAL OPS.