What was found
IN LEVEL FLIGHT, AT FLIGHT LEVEL 300, GOT SMOKE LAVATORY SMOKE WARNING 3 TIMES FOR 1 - 2 MINUTES EACH TIME. FLIGHT ATTENDANTS THOUGHT THEY SMELLED SMOKE, ACFT DIVERTED. VISUALLY INSPECTED FWD LAVATORY, NO BURNT WIRING OR SMOKE SMELL. REPLACED SMOKE DETECTION CONTROL UNIT IAW AMM 26-17-34-400-001A. BITE CHECKED GOOD. ALL LAVATORY SMOKE DETECTORS TESTED GOOD.