As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: FLIGHT CREW REPORTED THAT THE FORWARD LAVATORY SMOKE DETECTION CHIME ALERTED SMOKE WHILE PASSENGER WAS ALLEGEDLY VAPING. THE MID AND AFT RIGHT SMOKE DETECTION CHIME WENT OFF SIMULTANEOUSLY WITH FORWARD LAVATORY BUT NO PASSENGERS WERE USING THEM. THE FLIGHT DECK NEVER GOT ANY SMOKE ALERTS. MAINTENANCE ACCOMPLISHED A POWERUP TEST RESET OF THE LAVAORY SMOKE DETECTION SYSTEM PER AMM 26-17-00-710-001-A .