Originally Posted by
bonesbrigade
I know that some of the Boeing planes have the two levers which look like speed brake handles that are labeled STAB TRIM.
To those who fly these birds, what is it like using those? I know that most of the time you would use the thumb switches, and that on later versions the levers are replaced with dual switches, but in the event that you use them do you just pull them both back a bit or push forward as needed?
They provide an increased range of stab trim travel which is sometimes used to set takeoff trim with aft cg conditions. The signal also overrides or neutralizes (depending on model) any other conflicting trim inputs. Levers or switches are simple push-pull operation, spring loaded to neutral position.