Has anyone pressure tested a fuel tank?

[cap01]

tj , what era tank do you have that has the skylight in it ?

[t j]

That's what I thought. I just wonder if the seals under my filler caps will hold a seal at this age. I guess I'll find out!

Inflate with lung pressure only. If the cap seals won't hold that they need to be replaced.

[t j]

tj , what era tank do you have that has the skylight in it ?

My kit was delivered Sept. 1994. I never could figure out why the sky light. when it is installed and covered no light shines in.

[DesertFox4]

I never could figure out why the sky light. when it is installed and covered no light shines in.

You are not supposed to put covering material over the "sky-light".
My model 3 had this feature and worked well, except during night flight of course.