As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: PILOT REPORTS AT CRUISE, ECAM CAUTION WARNING MESSEGE APPEARED INDICATING LAV FIRE - NOT FOUND IN ANY LAV. MAINTENANCE INSPECTED LAV SMOKE DETECTORS, NO DEFECTS FOUND. PERFORMED SDCU 1+2 SYSTEM RESET AND BITE TEST OF ALL LAVS WITH NO DEFECTS FOUND.