Boeing discovered in 2017 that its 737 MAXs were being delivered without a flight-deck angle of attack (AOA) error warning activated as intended, but determined the issue was not a safety risk and did not need immediate correction, the company said May 5.  The revelation adds more context to why the AOA disagree warning lights, meant to tell pilots of a discrepancy between the aircraft's two AOA sensors, have only been active on MAX aircraft equipped with a package of options. It ...

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