I have finally started my -12 kit and ran into my first problem already.
On page 06-04, step 2 where it says to machine c'sink the six #40 holes. This seems to be counter to what Van's says on page 05-05E where they say "While it is acceptable practice to machine c'sink metal as thin as 0.032" for an AD426AD3 (3/32) rivet, We recommend dimpling in metal 0.04 and thinner".
I went ahead and did the machine c'sink as directed. However, since I had de-burred the holes on the other side maybe .005" deep, now the hole is about .012" oversize.
In examining the location of these rivets which are only 6 of many rivets and bolts holding the spar caps inplace, it would seem to me that the slightly oversize holes would be a very minor issue and I should just proceed. However I don't want to start making assumptions about quality compromises without some input from others with more experience and knowledge than me. Any advice would be appreciated.
Wayne
On page 06-04, step 2 where it says to machine c'sink the six #40 holes. This seems to be counter to what Van's says on page 05-05E where they say "While it is acceptable practice to machine c'sink metal as thin as 0.032" for an AD426AD3 (3/32) rivet, We recommend dimpling in metal 0.04 and thinner".
I went ahead and did the machine c'sink as directed. However, since I had de-burred the holes on the other side maybe .005" deep, now the hole is about .012" oversize.
In examining the location of these rivets which are only 6 of many rivets and bolts holding the spar caps inplace, it would seem to me that the slightly oversize holes would be a very minor issue and I should just proceed. However I don't want to start making assumptions about quality compromises without some input from others with more experience and knowledge than me. Any advice would be appreciated.
Wayne