35.Boeing also removed the G-force threshold for activating MCAS, causing it to be triggered by only a single angle of attack sensor. Despite these choices, Boeing chose to retain the failure assessment categorized as major, and did not add any redundancy.36.Boeing did not perform an additional safety analysis, or inform the FAA of its changes to the MCAS design. Boeing never informed the FAA of the expansion of MCAS? authority in low-speed situations. Boeing also did not inform the FAA that MCAS? control was expanded to move the tail stabilizer from 0.6 to 2.5 degrees in 10 seconds, that the MCAS could be triggered successively, or that MCAS would be triggered by only a single angle of attack sensor.
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