All the twisting and wrangling in this thread over whether to do the checklist, seems like more effort than simply doing the checklist.
Originally Posted by
Denti
i wouldn’t bother unless there are more things to change than just activating the secondary, like flap setting ans FCU altitude.
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Say there was a flap setting or altitude change, but you had missed that fact. Then this system doesn't work, does it? Within this logic, the same failure that leads to missing the change, also leads to not doing the checklist that would catch the missed change.