By now one has to start to wonder why the doors didn't fell off much earlier. While Boeing has to change a lot about how they manufacture airplanes, the airlin

By now one has to start to wonder why the doors didn't fell off much earlier. While Boeing has to change a lot about how they manufacture airplanes, the airlines themselves should install a much more aggressive process to look out for these kind of manufacturing defects. There needs to be processes in place where e.g. any loose bolt found during maintenance gets reported and tracked to spot these kind of things early on. On top of that, there should be random probing of the components of the plane.