Brief Description: Iinstall Tie-Downs on L & R Wing
13-4: Step 11: Rivet nutplates to the left and right wing Tie-Down Brackets. I found the nutplates not to be perfectly symetrical and turns some of them end for end to align better with the holes drilled. Used extra AN3 bolt to ensure alignment when riveting. 13-5: Step 1: Drilled #12 and 1/4 inch holes of all four Aileron Bellcrank Brackets (W-823PP). Had to lightly sand the top edge the left wing brackets to fit next to the upper spar step-bar. Used a little green primer to cover the exposed metal from sanding of powder coat. Torqued to 30 in-lbs and applied torque-seal.