dear international pilots
as I don't know how to fly around jolly olde or any of the other nations across the pond may I say this:
go out and buy a copy of the US AIM (aeronautical information manual)...open up to security and you will learn all sorts of nice things.
as the AIM is also available online, look up on google if you like.
we don't mind talking about it as it is free and open information . you can buy a copy of the AIM anywhere and I am sure the bad guys already have a copy!
flaps down after landing can, and I repeat CAN , mean: we are desperate and want armed intervention no matter what.
it can mean you should politely say to tower, our company requires us to taxi in with flaps down, don't think anything is wrong.
on the dc9, flaps 15 to the gate was normal, but flaps 40 would get the attention of a sharp eyed controller...not too many of those around anymore.