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Main Spar nut plates

VA Maule

Well Known Member
Did a search but no joy , however I'm quite sure someone has had this same question. Main Spar W-706 between inboard most rib W-710 & W-711 are 3 pre-punched nut plate hole sets in the main spar. Can be seen on DWG 11 A view #4. I can't find any call out for which nut plate go hear if any go hear at all?

What am I missing? Or are they for some other model that share this component ?
 
Those are for tank attach nutplates. For all of the other tank attach brackets, the nutplates live on the bracket and the bolts are inserted from behind the spar, but for the inboardmost bracket, the nutplates are on the spar and the bolts are inserted from the forward side. The nutplates used there should be the same as those used for the other attach brackets, if memory serves.
 
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