What was found
DURING CLIMB OUT AT 15,000 FT, CREW RECEIVED A LAV SMOKE ALARM. CREW FOLLOWED QRH AND DECLARED AN EMERGENCY AND RETURN TO DEPARTURE. A PASSENGER CONFESSED TO F/A THAT HE USED A SMOKELESS CIGARETTE IN THE LAV. MX INSPECTED AND TESTED LAV SMOKE DETECTION SYSTEM, PERFORMED GVI OF THE LAV LIGHT BALLASTS AND ELT, NO DEFECTS FOUND.