Wings (Section 7): May 2008 Archives
I've clecoed the left W-821 so that I can back drill it as it saves some work in measuring out.
Standard drill out. Ignore the vertical marks on the left of the holes as I changed my markup at the last moment!
The Flap Brace W-821 is NOT fully pre-punched and the 'wing' flange needs to be measured out and drilled accordingly. I then used this 'drilled out' brace as a template for the other lhs brace and also to align prior to drilling out the trailing edge of the lower wing skins which were also NOT pre-punched.
As a precaution, after marking out the 1/4" edge distance I also used a spring punch to ensure I did not drift off with the drill out.
