Originally Posted by
MD-11Loader
Nope. You can upgrade to any fleet. You then incur a two year seat lock and one year flow lock.
It's worth noting that involuntary upgrades (displacements) do not incur a seat lock and my transfer to different equipment as soon as they can hold it. If a pilot really wants to be a captain on certain equipment they can wait for it to be open before bidding to captain. If they are involuntarily displaced into the captains seat before this happens they do not incur a seat lock and can still bid to the equipment of their choice as soon as it becomes vacant and their seniority can hold it.