As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE MID RIGHT LAVATORY SMOKE ALARM WENT OFF WITH NO SIGNS OR EVIDENCE OF SMOKE OR FIRE. WATER PUT IN TRASH AND ALARM RESET. PERFORMED VISUAL INSPECTION OF MID RIGHT SMOKE DETECTOR AND OVERHEAT INDICATOR. NO EVIDENCE OF SMOKE. SYSTEM OPERATION IS NORMAL.