MCAS Convolution  Coverage of the Lion Air Flight 610 (JT610) accident investigation (Nov. 26-Dec. 9, p. 56) leaves me puzzled as to why the Boeing 737 MAX (and most likely other aircraft) use an automatically controlled, all-moving horizontal stabilizer for real-time pitch and trim adjustments in flight while the pilot makes manual pitch inputs using an elevator surface with much less control authority.  In the past, it may have been mechanically less complex to fly with a ...

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