As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: SMOKE DETECTOR IN LAVATORY WENT OFF AT CRUISE ALTITUDE FL250. FLIGHT ATTENDANTS CHECKED ALL LAVATORIES AND NOTHING NOTED. MAINTENANCE RESET CIDS 1 AND 2 PER AMM 23-73-00. A SATISFACTORY OPERATIONAL CHECK OF THE SMOKE DETECTION SYSTEM WAS ACCOMPLISHED WITH NO ISSUES NOTED.