Thanks for the encouragement, I've had a response by email that should cover what I need.
Timelord - I am referring to the Inboard most Flap of the four trailing edge Flaps. It has a flat protruding section that sits in a recess in the wing when the Flaps are up and is retracted into the fuselage when the wings are swept back.
This is the focus of my project, basically I'm planning to redesign it so that it doesn't have some cutouts that need to be filled. This is a major labour burden at second line.