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Sensors Linked to Boeing 737 Crashes Vulnerable to Failure

  • Angle-of-attack devices thrown off by birds, airport equipment
  • Review of public databases reveal at least 140 incidents
Bloomberg business news
Impact of Boeing’s Global Grounding of 737 Max to Increase in 2Q, Says Fitch Ratings
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The crashes of two Boeing Co. 737 Max jets in five months have focused attention on a little-known device that malfunctioned, starting a chain reaction that sent the planes into deadly dives.

Pilots have for decades relied on the weather-vane-like “angle of attack” sensors to warn them when they near a dangerous aerodynamic stall. But investigators are probing Boeing’s decision to enable the sensors on the Max model to go beyond warning pilots and automatically force the plane’s nose down.