SECTION 14: WING RIBS

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  • See this FB Post on ribs being shipped where embossing was done very shallow or not done at all. Also, newer ribs have an additional relief cut that causes edge distance issues with a nutplate.

Page 14-04

  • Step 2: The second instruction says to insert the snap bushing from the inside but Figure 2 shows it inserted from the outside and that seems to be more correct as the W-1029C angle that got notched would be in the way of the snap bushing when inserted from the inside.

Page 14-05

  • Several builders report callouts on page 14-05 with the wrong number of rivets to attach the ribs to the spar: Innermost rib needs 6 instead of 5 rivets, the 2 ribs inside the outmost rib need 8 instead of 4 rivets. See FB post 3/28/2022 and VAF thread 3/20/2016