The Boeing 737 MAX was cleared to fly again today by the FAA after being grounded for 20 months. The MCAS combined with faulty AoA indicators caused the initial two fatal crashes. What exactly was changed regarding these two systems to make the plane safe to fly again?

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The Boeing 737 MAX was cleared to fly again today by the FAA after being grounded for 20 months. The MCAS combined with faulty AoA indicators caused the initial two fatal crashes. What exactly was changed regarding these two systems to make the plane safe to fly again?

In: Engineering

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Boeing stated the changes to the MAX were mainly software based, adding warnings to alert pilots to sensor disagreements such as those that precipitated the two disasters that grounded the fleet initially, and making changes to the MCAS system itself to prevent inappropriate activation.