Is it possible to access parent's parent socket

I am making a turret blueprint.

I have a scene component (B) attach to a mesh component (A), there are two child mesh components (C) attach to the scene component (B).

The child objects (C) cannot access to the component (A) socket, component (B) is to control the pitch rotation of (C), but (C) is necessary to access (A) socket.

Is there a way to access (A) socket?

I solved my problem.

link text