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E-921 Gusset Drilling

RV701775

Active Member
Does anyone remember how they drilled the E-921 gussets on page 09-08 of the plants. If I try to drill from the inside into the forward spar, the other cleco holding the gussett is in the way, even with an angle drill. If I try to drill from the spar side, the root rib is in the way due to the angle.

I guess that I could just drill the spar holes without it being assembled.

Thoughts?
 
I don’t recall having any issues with those. Did you try putting clecoes in from opposite side you’re drilling from? Did you try removing the 1008 rib while you drill? I do remember that the 907 rear spar flanges had to be tapered/filed down where they meet the root and tip ribs.
 
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