Originally Posted by
Uplinker
On the OP question; there are rare occasions when ATC cut you in closer than you expected or asked you to keep the speed up, when I might ask: "Flap x as soon as you can", and we both understand that means when the speed has dropped suitably below Vfe next.
I can’t see a reason in a normal situation for a conditional request for a configuration change. I may have missed it, but I haven’t read anywhere where that is even a thing considered.