> Reference the British Airways flight 5390 accident where the pilot got sucked 3/4 the way out the cockpit window and slammed against the side of the fuselage

> Reference the British Airways flight 5390 accident where the pilot got sucked 3/4 the way out the cockpit window and slammed against the side of the fuselage while a flight attendant clung to his feet and the co-pilot safely landed. That incident led to a major change in how aircraft windows were designed. Instead of being fitted from the outside they were changed to being fitted from the inside. When fitted from the outside the job of the fasteners is to keep the cabin pressure from blowing the window out when the plane is high up and the outside pressure is low. When the plane is on the ground gravity will keep the window in place and the fastener isn't doing much. Botch installing the fasteners and you don't find out about until the window blows out at high altitude, like on that flight. When fitted from the inside the job of the fasteners is to keep the window from falling in due to gravity when the plane is on the ground or at low altitude. At higher altitudes the cabin pressure pushes the window firmly into the frame and the fasteners aren't doing much. Botch installing the fasteners and the window falls in on the ground or at low altitude which is a lot easier to deal with then a window blowing out at high altitude.