Quote:
Originally Posted by Firebot
The ADIRU is the sensor. (one of two and only one on at one time). ADIRU sensor malfunctioning and giving faulty data is what caused the MCAS to take control of the plane on the Lion Air crash and having it nosedive.
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I don't know where you're getting your information, but the ADIRU malfunctioning as a whole would not cause MCAS to engage. A failing ADIRU would kill all of your instruments, not trigger MCAS to trim the nose down.
In the Sunwing incident, the left side ADIRU malfunctioned, which caused the Captain's instruments to fail. The second ADIRU, which supplies the right side instruments, was still working, so the First Officer simply took over control of the plane, and they landed safely.