What was found
FLIGHT DECLARED AN EMERGENCY AFTER A BURNING RUBBER ODOR WAS REPORTED IN THE FWD CABIN. NO VISIBLE SMOKE WAS IDENTIFIED. MX FOUND THE READING LIGHT INSULATOR AT ROW 2 A&B OVERHEATED, DISCOLORED, AND MELTED. THE READING LIGHT ASSY WAS REPLACED AND THE ACFT RETURNED TO SERVICE.