As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW CREW REPORTED AMBER GEAR LIGHT REMAINED ILLUMINATED & WAS ACCOMPANIED BY GEAR DISAGREE MESSAGE. EMERGENCY DECLARED FLIGHT RETURN DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. LT MLG UPLOCK ASSEMBLY FORWARD SPRING WAS MISSING. REPLACED UPLOCK SPRING FOR LT MLG & CONTROL LEVER MODULE. SYSTEM GROUND CHECKED NORMAL OPERATION CLOSED.