As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH- ON FLIGHT 3659 THE CREW NOTED THAT THE SECONDARY LANDING GEAR INDICATOR WAS SHOWING LEFT MAIN LANDING GEAR UNLOCKED. MAINTENANCE REMOVED AND REPLACED THE LEFT HAND LANDING GEAR PROX SWITCH. PERFORMED A OPERATIONAL CHECK, NO DEFECTS NOTED AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.