Began preparing the substructure for the instrument panel. This first part is referred to as the Upper fwd fuselage assembly. It attaches to the firewall and supports the top skin. The aft most portion will hold the instrument panel. There are three fuselage ribs that need to be deburred and nutplates installed. The ribs attach to a subpanel. AFt of the subpanel, on each side are two sub panel sides.