What was found
STARBOARD LAVATORY SMOKE DETECTOR BECAME ACTIVE AT 10,000 FEET THROUGH 16,000 FEET DURING CLIMB, THEN QUIT. NO BURNING OR SMOKING MATERIALS NOTED IN FLIGHT OR AFTER THE AIRCRAFT LANDED. INSPECTED SYSTEM AND DETERMINED TO BE SMOKE FROM THE AUXILIARY POWER UNIT. PLACED APU ON MEL, REFERENCE 49-1. MEL CLEARED ON 5/30/97 BY REPLACING THE SMOKE DETECTOR MODULE, WHICH WAS NOTICED TO GO OFF WHEN TOUCHED, OPERATIONAL CHECKS GOOD.