Harley_Pilot
Member
I'm just starting the wings. Things are going well but I'm stuck at 13-03 step 6. I've riveted the wing access plate attach nutplates to the spar after countersinking the rivet holes. The second half of step 6 is to countersink the nutplate screw holes on the spar flange. Figure 4 same page (wing access plate attach countersink detail) provides a drawing of the max inside/outside diameter of the countersink holes. The distance from the edge of the flange to the center of the screw hole in the nutplate is 4.5mm. The plan detail indicates the diameter of the countersink should be 7.8mm. That would mean the distance from the edge of the countersink hole to the edge of the flange would only be 0.6mm. I don't think that is correct. Suggestions?