Originally Posted by
MechEngr
If that does not work, pilot not flying will re-enable the switches as directed by the PF only long enough to use the trim switches to zero pitch control forces and immediately disable them when completed.
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?