What was found
AIRCRAFT WAS GROUNDED: LAVATORY / SMOKE ECAM MESSAGE AT FL350 CONTINUED AFTER FLIGHT ATTENDANT INSPECTION LAST THREE ROWS AIRCRAFT LEFT CALL BUTTONS WILL NOT EXTINGUISH. LAVATORY D CALL BUTTON UNABLE TO EXTINGUISH. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO SAV WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. MAINTENANCE ACCOMPLISHED A POWER UP TEST OF CIDS PER AMM 23-73-00, AN OPERATIONAL CHECK OF LAVATORY SMOKE DETECTION SYSTEM PER AMM 26-17-00, AN OPERATIONAL TEST OF THE PASSENGER CALL SYSTEM PER AMM 23-73-00. ALL TESTS GOOD AT THIS TIME. MAINTNANCE INSPECTED LAVATORY FOR SIGNS OF SMOKE OR TAMPER OF DETECTOR AND FOUND NONE. AIRCRAFT WAS DETERMINED OK FOR CONTINUED SERVICE.