As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAV E SMOKE DETECTION AURAL AND LIGHT ACTIVATED IN FLIGHT. NO SMOKE WAS FOUND. RESET AFT PANEL - AURAL AND LIGHT INDICATIONS EXTINGUISHED. CIDS PANEL LAV SMOKE ILLUMINATED. MAINTENANCE PERFORMED OPERATIONAL TEST OF THE LAV SMOKE DETECTION SYSTEM IAW AIRBUS MAINTENANCE MANUAL 26-17-00-710-001 WITH NO FAULTS NOTED.