Step 1-7. Clecod both top skins into place with wing walk doublers. Match drilled #40 the nutplates in las row and wing walk doubler. Final drilled #19 screw holes. Machine countersunk all the wing walk doubler locations. Dimpled the remainder of the both skins.
Step 6. Removed a thickness of where both skins overlap at the leading edge. Primed the bottoms of the top skins.
