Joined and match drilled parts to the Center Section Bulkhead subassemblies. Deburred edges and holes. Primed holes in Center Section parts that were debured and the anodized was removed. Installed the 12 AN4-11A bolts (six per side) and torqued to 70 in/Lb. Torque-sealed installed nuts. Riveted parts according to isntructions.
