SECTION 13: MAIN SPAR

Build Instruction Updates

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Check for more recent updates here

Page 13-2

• Figure 1 shows an "extra" hole on the flange. It is not used anywhere, does not need countersinking.
  
• Step 7: Study figure 2 which points out that the long stiffeners align at the outboard end while the short stiffeners align at the inboard end.
• Step 8: See this FB thread regarding how to manage the imperfect overlay of the long and short stiffener.

Page 13-4

• Step 4 has you installing AN426AD4-6 rivets, but the rivets are not part of the SB kit (as of 3/2022).
  • Some builders indicate that the rivets are included in the SB kits.
• Step 6, check this FB thread on the tie down bracket and a potential gap between the skin and the bracket.