PPRuNe Forums - View Single Post - MAX’s Return Delayed by FAA Reevaluation of 737 Safety Procedures
Old 13th Dec 2019, 07:57
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MechEngr
 
Join Date: Oct 2019
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Originally Posted by Bend alot
For some reason the Emergency AD said DO NOT re-enable the switches (no reason given just don't do it).

Also turning them back on did not work for the Ethiopian crew - Question. Why did they turn them back on, if they did not intend to use them to trim?
There was both a trim increment from the control wheel switch from one of the pilots and an autopilot fail warning that would only be issued if they tried to re-engage the autopilot. Both re-enabling the motors and re-enabling the autopilot are cautioned against in this situation. It's not clear why they did not continue to trim with the trim switch.
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