I think you misremember. The cause of the fire on Air Canada flight 797 was never conclusively determined; a cigarette could not be completely ruled out, but wa

I think you misremember. The cause of the fire on Air Canada flight 797 was never conclusively determined; a cigarette could not be completely ruled out, but was deemed very unlikely. Smoking culture was a contributing cause since it made fires in trash bins so common that the pilots didn't react with urgency to a fire that looked like that (but in that case was definitely not). Having smoke alarms was absolutely the correct response, because smoking is by no means the only cause of fires on airplanes. In fact, I'm not even sure there has been a single fatal crash involving fire that has been definitely caused by smoking, but there are many that are known to have been caused by other things, such as Nigeria Airways Flight 2120, Swissair flight 111, ValuJet flight 592 and China Airlines Flight 120.