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Addressing American Airlines pilots, Boeing vice-president Mike Sinnett contradicted reports that the MCAS had a single-point failure, because the pilots themselves are the backup. Reporter Useem said in The Atlantic it was "showing both a misunderstanding of the term and a sharp break from Boeing's long-standing practice of having multiple ...
[65] [66] [67] The MCAS control law, a few lines of software code in the FCC, could autonomously command nosedives, when even a single sensor failure resulted in bad data; MCAS was omitted from aircraft manuals and training, [68] therefore flight crews had no knowledge of its existence or functioning until Boeing published a bulletin on November 6.
It acknowledged a wider range of contributory causes, but focused on the MCAS. Boeing's not classifying this as "safety critical", part of its efforts to avoid regulatory oversight and investigation, demonstrated inappropriate influence by Boeing over the FAA, which had then overruled safety concerns flagged by its own experts. [61] [62]
Families of victims who died in the crashes alleged Boeing had recklessly installed and failed to fully inform pilots about a new anti-stall system on its 737 Max-8 planes called “MCAS ...
Boeing’s plan to get back on solid footing after a series of quality flaws in its bestselling jet suffered a near disaster when a plane panel blew out during an Alaska Airlines flight, leaving a ...
The crashes of Lion Air and Ethiopian Airlines in 2018 and 2019, which killed a total of 346 people, both involved the failure of a Boeing software system known as MCAS.
Leeham News, which principally covers Airbus, Boeing, Bombardier, and Embraer issues, [138] reported that the crew did not have a clear knowledge that trim runaway checklist will disengage MCAS. [139] Boeing pointed to the successful troubleshooting conducted on 28 October as evidence that the MCAS did not change runaway stabilizer procedures ...
In 2018 and 2019, two Boeing Max 8 passenger planes suffered crashes months apart, killing a total of 346 people. The problem was pinned to the plane's Maneuvering Characteristics Augmentation ...