As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - CREW REPORTED LEFT GEAR DOOR WARNING LIGHT ILLUMINATED ALONG WITH AN EICAS MESSAGE. EMERGENCY DECLARED FLIGHT RETURNED MIA LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND LOOSE CONDUIT ON LEFT GEAR. REPLACED LEFT MAIN LANDING GEAR ACTUATOR. SYSTEM GROUND CHECK NORMAL OPERATION.