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Picklebobble2 Airlines are held to a high standard. Aircraft maintenance is carried out by skilled engineers who are good at their jobs. Accidents are inevitable and are going to happen sometimes, regardless of how good the airline is, how good their engineers are, and how much money they spend on maintaining the aircraft.
Pilots can get things wrong. Air France 447 is an unfortunate example of that. The captain chose the less experienced pilot to be in charge of the controls and went for his break. He did not return as quickly as he should have when being alerted by his pilots after the equipment began malfunctioning. It made their brains malfunction, especially Pierre Bonin, the man he put in control. His co-pilot probably would have prevented the crash if he had been left in charge. He was more experienced and was doing the right things, but his actions were being countered by Bonin. The mistake he made was not doing more about it. “Human error” is just that; we are all vulnerable to it, and physics and nature have the upper hand.
Using planes is our risk to take. We are at the pilot's mercy and nature's mercy.