As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A CUSTOMER SMOKING IN LEFT AFT LAV DURING FLIGHT, HOWEVER, SMOKE DETECTOR DID NOT ACTIVATE. PLEASE CHECK THAT SMOKE DETECTOR HADN'T BEEN DISABLED. MAINTENANCE ACCOMPLISHED SUCCESSFUL OPS CHECK OF ALL LAV SMOKE DETECTORS PER AMM 26-17-00-710-001-A. SMOKE DETECTORS INTACT ALL LAVS.