Step 1:  Cleco the W-1007B Rear Spar Reinforcement Fork, W-1007C Rear Spar Doubler Plate, W-1007D-L INBOARD Rear Spar Doubler , W-1007D-L OUTBOARD Rear Spar Doubler, W-1013-L Aileron Hinge Bracket Assembly and main spar and rib assembly and main spar and rib assembly to the W-1007A-L Rear Spar Web as shown in Figure 1. Match-Drill #30 the holes common between the rear spar parts and all three W-1025B Flap Hinge Ribs. Final-Drill #30 all common attach holes that have rivet callouts shown in Figure 2. including all holes that will attach the main wing ribs to the rear spar. Note that all the rib to spar attach points are not shown in Figure 2. Final-Drill #40 the holes common between the lower rear spar web flange and the ribs lower aft tab.

Step 2:   Machine countersink the bottom row of rivet holes on the W-1007C Rear Spar Doubler Plate where indicated in Figure 2. for the head of an AN426AD4 rivet.

Machine countersink the holes in the upper flange of the rear spar web that correspond to the W-1007D-L INBOARD, W-1007D-L OUTBOARD and W-1007E-L Rear Spar Doublers. See Figure 2.

Step 3:   Disassemble all  parts. Deburr the edges and holes for all parts.

Final-Drill #40 and dimple the 26 inboard most holes that are located in the upper flange of the W-100A-L Rear Spar Web above the W-1007B Rear Spar Reinforcement Fork.

Dimple the holes in the ribs lower aft tab and the holes in the W-1007A-L Rear Spar Web Lower flange that correspond to the tabs.

Prime all parts if/as required.

Step 4:  Reassemble parts per step 1. Rivet parts together per the rivet callouts shown in Figure 2. Note that some holes do not have rivet callouts and will be left open to attach the aileron and flap gap fairings in section 16. Tape over or mark the holes temporally to prevent accidentally riveting in these locations. Rivet the W-1013-L Aileron Hinge Bracket Assembly last to improve access to the rib at that location for riveting

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