What was found
LEVEL AT 7000 ON DOWNWIND FOR RUNWAY 22R KDTW. RECEIVED COCKPIT INDICATION OF SMOKE IN LAVATORY. PM CONTACTED F/A & REQUESTED INSPECTION OF LAVATORY AREA. F/A REPORTED ACTIVATION OF LAVATORY SMOKE ALARM, "SOME SMOKE IN CABIN" BUT NO APPARENT HEAT ANYWHERE IN LAVATORY AREA. PULLED CIRCUIT BREAKERS PER QRH, CONTACTED F/A TO ASSESS CABIN SITUATION. F/A REPORTED THAT SMOKE WAS NOT INCREASING AND THAT SHE HAD AGAIN CHECKED THE LAVATORY AREA FOR SIGNS OF HEAT AND FOUND NONE. AT OUTER MARKER F/A REPORTED THAT SMOKE WAS DISSIPATING AND NO HEAT IN LAVATORY AREA WAS DETECTED. NORMAL LANDING AND TAXI TO GATE.