As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: IN CRUISE FLIGHT GOT ECAM MESSAGE SMOKE LAVATORY SMOKE FOR ABOUT 30 SECONDS. COMPLIED WITH ECAM AND FOLLOW UP PROCEDURES. LEFT AFT LAVATORY CONFIRMED SAFE BY FLIGHT ATTENDANT. NO EVIDENCE, PASSENGER WAS IN LAVATORY WITH ECAM. MAINTENANCE RESET CIRCUIT BREAKERS PER AMM 26-17-00 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.