As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PRIOR TO LANDING LAVATORY AFT RIGHT SMOKE DETECTOR WENT OFF TWICE- NO ONE WAS IN AFT LAVATORY, FLIGHT ATTENDANT CANCELLED TWICE. LATTER AT GATE REPORTED FUME SMELL FROM LAVATORY NO ECAM INDICATIONS. MAINTENANCE FOUND NO ODORS AND PERFORMED AN OPERATIONAL CHECK OF LAVATORY SMOKE DETECTION PER AMM 26-17-00. WITH NO DEFECTS NOTED.