Step 2:   Trim T-1011 Tank Stiffeners as shown in Figure 1. (Figure 1 shows the untrimmed stiffeners "flat" or "unbent for clarity"

One vent line clip is trimmed from the end of each "stick" of stiffeners. Only one vent clip is required fro each tank and extras may be discarded. Note: It was easier to drill for snap bushing before cutting off see next step.

Set half the tank stiffeners aside for assembly into the right tank.

One hole is enlarged for a snap bushing that will hold the vent line

Position that clip will be riveted on later

Step 3:   Trim T-1012 Tank Attach Zee's as shown in Figure 2. (Figure 2 shows the untrimmed zee's "flat" or "unbent" for clarity).

Step 3 A.   Note that the inboard tank attach zee has no holes for nut plate attachments

Step 4:   Fabricate two Tank J-Stiffeners by cutting two pieces of J-Channel each one 64 1/2 inches long. Draw a centerline on each tank J-stiffener as shown in Figure 3. Set one tank J-stiffener aside for assembly into the right fuel tank.

Step 5:   Place the T-1001-L Tank Skin in the Leading Edge Assembly cradle. Remove the vinyl film from the inside of the tank skin and Deburr edges.

Cleco all the T-1011 Tank Stiffeners and VA-112 Drain Flange to the tank skin as shown in Figure 4.

Final-Drill all the tank stiffeners and drain flange to the tank skin. Note: Again I make a little black dot with a Sharpie after I drill the hole. That way if I have to leave I know which holes have been drilled.

The most inboard rivet hole in the two tank stiffeners in the bottom of the inboard rib bay do not correspond to the most inboard hole in the tank skin. Match-Drill from the skin into the stiffeners,

 

Remove the stiffeners and trim the inboard ends of the stiffeners leaving 1/4 inch from the center of the "new" hole to the end of the stiffener.

Step 6:   Cleco the T-1003-L Tank Outboard End Rib, T-1003C-R Inboard Rib-Fwd and T-1004-L Tank Interior Ribs to the T-1001-L Tank Skins as shown in Figure 5.

Step 1:   Fit the T-1009 Tank J-Stiffener to the T-1001-L Tank Skin as shown.

Position the J-stiffener such that there is a 1/4 inch from the first hole center to the end of the J-stiffener. Align the centerline drawn on the flange of the J-stiffener with the holes in the tank skin, then match-drill and Cleco the J-stiffener to the tank skin.

Step 2:   Cleco the T-1005-L Tank Attach Bracket to the T-1001-L Tank Skin and T-1003C-R Tank Inboard Node Rib as shown in Figure 2.

Final-Drill all tank attach bracket rivet holes to final size.

Step 3:   The T-406B Fuel Cap Flange is provided with a slight bend in the fwd/aft direction. In preparation for fitting the fuel cap flange to the tank skin, adjust the amount of bend in the flange so that it conforms to the curve of the tank skin. See Figure 1 for the approximate shape.

The vent clip clecos through the most forward rivet hole in the cap flange.

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