[jdmunzell]

Hi all:

I can't recall if it is necessary to do the fanning out process when drilling your wing skins on the matched hole kits. Anyone know?

 

[mcencula]

Not necessary.

 

[N941WR]

Yes, it is necessary.

Start in the middle and work outward. It will help eliminate the chance of any puckering. This might be a bigger issue on the longer wing of the -9 than on an -8 or -7 but it is still "best practice".

 

[jdmunzell]

okay, I have 1 yea, 1 nay. Any other opinions?

 

[terrye]

wing skin drilling

I don't think I'd bother fanning out with the drilling, but I don't think it would take any more (or less) time than starting out at one end and working to the other. Can't remember if I did or not (RV-9A).

But the instructions say to do so during the riveting and that is what I did.