The Wall Street Journal: Boeing didn’t tell Southwest that 737 Max safety feature had been turned off

Plane maker Boeing Co. didn’t tell Southwest Airlines Co. when the carrier began flying 737 Max jets in 2017 that a standard safety feature, found on earlier models and designed to warn pilots about malfunctioning sensors, had been deactivated.

Federal Aviation Administration safety inspectors and supervisors responsible for monitoring Southwest LUV, -0.69% , the largest Max customer, were also unaware of the change, according to government and industry officials.

Boeing BA, -0.53% had turned off the alerts which, in previous versions of the 737, informed pilots if a sensor known as an “angle-of-attack vane” was transmitting errant data about the pitch of a plane’s nose.

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