As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AFTER LEVEL OFF AT FL 360, LAVATORY SMOKE WARNING INDICATION THAT WENT OUT AFTER APPROXIMATELY 10 SECONDS .CONFRIMED WITH FLIGHT ATTENDANTS THAT THERE WAS NO SMOKE IN ANY LAVATORY. ACCOMPLISHED SDCU RESET PROCEDURE IAW TSM 26-17-00,