> DC-10 are not transporting passengers anymore. Neither MD-11. Perhaps because they’re known? They were up until the 2010's. The design problems that led to t

> DC-10 are not transporting passengers anymore. Neither MD-11. Perhaps because they’re known? They were up until the 2010's. The design problems that led to the crashes had long been solved. The reason they're not flying anymore isn't because they were unsafe or because people are scared of them, but because over time it eventually becomes impossible to find replacement spare parts, and because 3 engines are more expensive to run and maintain than 2.