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Boeing Didn’t Advise Airlines, FAA That It Shut Off Warning System

WSJ Original article ›
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Accident investigators for the Ethipian and Lions Air crashes say Boeing faile to inform FAA safety inspectors and Southwest safety specialists of the deactivation of a feature that warns pilots about malfunctioning sensors. The new models of the plane had this feature made optional in a new automated stall prevention system called MCAS. Southwest Airlines management and pilots did not know about this in 2017 a year after the planes went into service, and learned about this only after the Lions Air crash in October 2018. After the crash of Lions Air plane Southwest had asked Boeing to activate the alerts on its MAX planes.



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