What was found
LGA-GSO - FLT 1621 - AFTER TAKEOFF, THE RIGHT AIR CONDITIONING PACK DUCT TEMP INCREASED TO AVOVE 150 DEGREES, CAUSING THE LAVATORY SMOKE DETECTORS TO ACTIVATE. THE AIRCRAFT RETURNED TO THE FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE PLACED THE RIGHT AIR CONDITIONING AUTO TEMP CONTROL SYSTEM ON MEL AND RELEASED THE AIRCRAFT FOR FLIGHT. DURING OVERNIGHT MAINTENANCE THE RIGHT AIR CONDITIONING AUTO TEMP CONTROLLER WAS REPLACED. (M)