As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANT CALL LIGHT ILLUMINATED RANDOMLY 3 TIMES THEN FWD LAV SMOKE DETECTOR ALARM SOUNDED FOR APPROXIMATELY 2 SECONDS IMMEDIATELY AFTER. NO EVIDENCE OF SMOKE/FIRE/FUMES PRESENT. PERFORMED LAV SMOKE TEST. SYSTEM OPERATES NORMAL REF AMM 26-14-00