What was found
JFK - INFLIGHT LGA-ORD. CAPTAIN REPORTED HE HAD GEAR LIGHT INDICATING GEAR DOWN WHEN IT SHOULD HAVE BEEN UP AND THERE WAS A BURNING RUBBER SMELL IN COCKPIT. EMERGENCY DECLARED LANDED JFK WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED LEFT AND RIGHT AIR CONDITIONING REGULATE VALVE. REPLACED RIGHT MAIN LANDING GEAR DOOR TARGET AND BRACKET ASSEMBLY. SYSTEM GROUND CHECK NORMAL OPERATION.