As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - LEFT HAND MAIN LANDING GEAR AMBER LIGHT ILLUMINATED AFTER TAKEOFF. RETURNED TO MIA AND LANDED WITHOUT INCIDENT. FOUND LOOSE CONNECTOR OF SYSTEM NUMBER ONE MICROSWITCH 31GB. REPOSITIONED AND SECURED LOOSE CONNECTOR. SYSTEM GROUND CHECKED NORMAL OPERATION.