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RV-7A Construction Log
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Date:  8-25-2009
Number of Hours:  0.50
Manual Reference:  
Brief Description:  Fwd Fuselage - Pitot Hole Error

I found what looks like an error on the drawings and in the parts. Since I'm finishing the side skin I read the drawing and saw that I need to enlarge the pilot hole for the pitot tube to 5/8. This shows on the rivet drawing #28. So I did. And the note says enlarge both skin and underlying outboard seat rib.

But the seat rib already had its tooling hole enlarge to 5/8 for the pitot tube back when I was working on the mid-fuselage. And as you can see from the drawings, these should be the same hole. But they are in two different locations. Good thing they don't overlap. I think I can use it like this. But the forward hole called on on drawing #22 is a hole to no-where.

********************** ADVICE ***********************
Don't enlarge the tooling hole as shown in photo 2 below and on drawing #22. Instead just wait and enlarge both using the skin pilot hole as the guide and location. I added this warning to my earlier construction log page on June 13, 2009.
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Enlarge pilot hole to 5/8

Enlarge pilot hole to 5/8

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Don't enlarge this tooling hole

Don't enlarge this tooling hole

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They are not coincident.

They are not coincident.

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