C lecoed the center and mid lower skins onto the seat subassembly. Match drilled #40 the holes into the ribs, stiffeners and bulkheads. Dissassembled and deburred all holes. Dimpled and machine countersunk the holes called out per plans. Scuffed and primed all the mating surfaces. Clecoed the skins into place at the ribs and bulkheads. Added the stiffeners in place.
