What was found
SUX - FLT 2935 - DURING FLIGHT AT CRUISE, LAVATORY SMOKE RED WARNING LIGHT ILLUMINATED WITH TRIPLE CHIME AND MASTER WARNING LIGHT. THE FIRST OCCURANCE OF THIS LIGHT EXTINGUISHED ON ITS OWN, SUBSEQUENTLY THE LIGHT AND CHIME REILLUMINATED REPEATEDLY AND RANDOMLY WITH NO ACTUAL SMOKE SMELLED OR SEEN. QRH PROCEDURE WAS FOLLOWED, M-27 CB PULLED. MAINTENANCE REPLACED LAVATORY SMOKE DETECTOR. ALL CHECKS GOOD. (M)