RV-7 tank inboard tank rib

[Garland Edwards]

RV7 tank inboard tank rib.....The 3/16 dia. tooling hole near the spar end is just under the access ring/ gasket. Seems too close for comfort. The ring can not be repositioned because of the raised boss.
How have others assured a no leak seal?

Thanks
Ed

 

[rapid_ascent]

I have the same problem on my first inboard rib since my alignment with the stiffener ring is off slightly. I figured out how to fix this on the second tank. I was thinking about rebuilding the inboard rib assembly. A large rivet can't be used to fill the hole. What I decided to do was make a very small backup plate that I riveted on with two AN3 rivets. Iput fuel tank sealant on the plate before riveting it on. I plan on using sealant and no gasket but I'll add another glob on the outside where the tooling hole is located.

 

[longranger]

Ed,

I just covered mine up with the stiffener ring. I think the instructions say you don't have to seal the ring to the rib, but I did anyway. My ring covered the hole completely, but if it's only a small gap the sealant will take care of it. The gaps in the corners will be way bigger than that...

 

[Garland Edwards]

Thanks ....

Ray, Miles,
Thank you for taking time to assist. I will be doing mine the same way.
No one on the forums has noted leaks at this location before. I'll keep moving forward.

Ed