As the pilots of the doomed Boeing jets in Ethiopia and Indonesia fought to control their planes, they lacked two notable safety features in their cockpits.
Sometimes these optional features involve aesthetics or comfort, like premium seating, fancy lighting or extra bathrooms. But other features involve communication, navigation or safety systems, and are more fundamental to the plane's operations.Many airlines, especially low-cost carriers like Indonesia's Lion Air, have opted not to buy them - and regulators don't require them.
That software system takes readings from two vane-like devices called angle of attack sensors that determine how much the plane's nose is pointing up or down relative to oncoming air. When MCAS detects that the plane is pointing up at a dangerous angle, it can automatically push down the nose of the plane in an effort to prevent the plane from stalling.Bloomberg
Earlier this week, Dennis A. Muilenburg, Boeing's chief executive, said the company was working to make the 737 MAX safer. But what Boeing doesn't say, he added, is that it has become "a great profit centre" for the manufacturer.
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