https://en.wikipedia.org/wiki/Air_Midwest_Flight_5481 https://www.dailymail.co.uk/travel/article-590144/Obese-passengers-caused-plane-crash.html https://generalaviationnews.com/2014/05/22/overweight-unstable-airplane-crashes/ https://www.consumeraffairs.com/news/faa-requests-that-airlines-weigh-passengers-to-keep-planes-safe-051821.html https://www.ifly.com/flying-info-and-tips/overweight-passengers If passengers are 50% heavier than they used to be, it does make a difference in some airplanes. It was a very long time ago, but I do remember stepping on a scale with my luggage before getting on a small regional airplane.