US regulators considered grounding some Boeing 737 MAX planes last year after learning belatedly of a problem with a system that is now the main ...
in March have zeroed in on the planes' anti-stall system, the Manoeuvring Characteristics Augmentation System, or MCAS.Last year, before the Lion crash, inspectors with the Federal Aviation Administration discovered that the manufacturer had de-activated a signal designed to advise the cockpit crew of a malfunctioning of the MCAS system, the source said.
After some debate, they gave up on this hypothesis but it was never passed on to higher-ranking officials in the FAA, the source said, confirming a story in The Wall Street Journal.The inspectors learned that Boeing had opted to make the malfunction signal optional and an extra that would cost more money.
The Ethiopia Airlines crash left all 157 people on the plane dead and led to all Boeing 737 Max planes all over the world being grounded. In this case too the MCAS is being looked at as a possible cause of the crash.
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