Originally Posted by
ElNull
As I understand we use the Alternate pitch trim during "a complete loss of flight control signaling", however, I don't see any checklist that direct us to use Alternate pitch trim. Any idea under what circumstances exactly do we use it?
You would use them if the trim switches on the control column / yoke were inoperative. If you found you couldn’t trim the normal way, you could use the alternate trim switches instead.
No checklist required.