As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAV SMOKE ECAM IN FLIGHT. ECAM CLEARED ITSELF AFTER 3 SECONDS, FA'S INVESTIGATED AND FOUND NO SOURCE OF FIRE. SUSPECT PAX VAPING. PERFORMED TSM 36-17-00-810-804-A NO DETECTORS FAULTING. NO FAULTS ON POST FLIGHT REPORT CLEANED DUST FROM ALL 4 LAVS. OK FOR SERVICE.