Brief Description: Fabricate Left Wing Wing Box J-Stiffeners
13-2: Step 5/6: Fabricate two W-1028A/B Wing Box J-Stiffeners. Step 7: Shim spar sag out before fitting J-Stiffeners. I used some string and eyeball to check straightenss. Clamp stiffeners in place: Step 8: Match-drill w/ #40 L-Spar Assembly and J-Stiffeners. Deburred spar and stiffeners on edges and holes.