The dropped hinge flap rotates about a hinge located below the chord line of the flap. Accordingly, as the dropped hinge flap extends, it increases the camber of the wing and also moves aft in a Fowler motion. This Fowler motion can increase wing area and create a gap between a trailing edge of the wing and a leading edge of the flap. The gap can allow high energy air from the bottom of the wing to energize lower energy air flowing over the top portion of the flap.
а есть вот такоеKrueger flap: hinged flap on the leading edge. Often called a "droop."
I think that you are confusing with "drooped ailerons".
On all Airbus FBW planes the ailerons are lowered (drooped) some 10 degrees when the flaps are extended beyond a certain level. That way the ailerons assist the flaps a little. The MD-11 has the same feature. Maybe also other relatively modern planes.