To compete with the Airbus A320neo without requiring airlines to put pilots through expensive full-flight simulator retraining, Boeing fitted larger engines on the 737 airframe and wrote automated flight-control software called MCAS (Maneuvering Characteristics Augmentation System) to push the nose down when angle-of-attack sensors spiked. Boeing intentionally omitted all mention of MCAS from flight crew operations manuals and designed the system to rely on a single sensor without redundancy. In 2018 and 2019, faulty sensors triggered MCAS dives on Lion Air Flight 610 and Ethiopian Airlines Flight 302, killing 346 people before a worldwide 20-month fleet grounding.
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Archive Record · 2010s
Fatal Code: How Boeing Hid the 737 MAX's Faulty MCAS Software to Cut Training Costs
Boeing 737 MAX MCAS / 2010s
To compete with the Airbus A320neo without requiring airlines to put pilots through expensive full-flight simulator retraining, Boeing fitted larger engines on the 737 airframe and wrote automated flight-control software called MCAS (Maneuvering Characteristics Augmentation System) to push the nose down when angle-of-attack sensors spiked. Boeing intentionally omitted all mention of MCAS from flight crew operations manuals and designed the system to rely on a single sensor without redundancy. In 2018 and 2019, faulty sensors triggered MCAS dives on Lion Air Flight 610 and Ethiopian Airlines Flight 302, killing 346 people before a worldwide 20-month fleet grounding.
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