Completed riveting center section aft bulkhead and the left and right aft side bulkheads to the center section assembly. Clecoed left an right fuselage side skins to the center section assembly an left and right skin stiffeners. Match drilled #30 the left and right skin stiffeners to the center section assembly. Removed clecos, deburred holes, and riveted, as directed.
Right fuselage skin stiffener riveted in place (left is similar)
