What was found
EWR - FLT 2164 - ON DESCENT INTO LGA FROM DCA, CREW RECEIVED A NR 4 LEADING EDGE KRUGER FLAP AMBER LIGHT ALONG WITH A LEADING EDGE TRANSIT AMBER LIGHT DURING SLAT EXTENSION. CREW RECYCLED FLAPS IN HOPES OF CLEARING THE PROBLEM WITH NO HELP. CREW DECIDED TO DIVERT FLIGHT TO EWR DUE TO THE LONGER RUNWAYS. FLIGHT LANDED WITHOUT INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED, REPLACED AND RIGGED THE NR 4 LEADING EDGE KRUGER FLAP UP PROXIMITY SENSOR IN ASSOCIATION WITH MM 27-88-11. OPERATIONAL CHECK GOOD.