Airlines What Really Happens If You Smoke on a Plane or Destroy the Lavatory Smoke Detector by SharonKurheg July 8, 2025 by SharonKurheg July 8, 2025 Commercial planes with a passenger capacity of 20 or more are equipped with a smoke detector system that monitors the lavatories for smoke. Smoke indicators provide a warning light in … 0 FacebookTwitterPinterestEmail