Dimpled the W-1201-L Inbd Wing Skin in two places as shown in Figure 1 page 17-02. Cleco'ed the W-1201A Doubler to the inbd wing skin to the bottom flange of the Front Spar Assembly per figure 1 same page.
While protecting the Spar with spare metal, final drilled #20 the holes in the doubler, inbd wing skin, and flange of the Front Spar Assembly for the eight BSPQ rivets per call out figure 1 same page. Disassembled and deburred all drilled holes.
Cleco'ed the inbd wing skin to the entire bottom of the wing and cleco'ed the doubler in place.
Riveted the inbd wing skin and the doubler to the bottom of the wing using Rivets called out in Figure 1 and Figure 1 call out both page 17-02. Final drilled 3/8th the #30 hole in the W-1203-L-1 Outbd Wing Skin for the tie down ring per figure 2 same page.
Cleco'ed the W-1203-L-1 Outbd Wing Skin to the wing skeleton per figure 2 same page and riveted leaving open the holes for the leading edge, inboard and outboard edges, and the holes for the Hinge Ribs as shown on page 17-03 figure 2.
