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20-02 Flap & Aileron Gap Fairings

It was going to be a few days before Tim was available to help with more Proseal fun on the Right Tank, so I decided to leap ahead to Section 20 and get the Flap & Aileron Gap Fairings done. Got to keep this project moving! : )

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After all the Proseal it was a pleasure to deburr! Well alright, nearly a pleasure.

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After the usual scuffing and degreasing I sprayed the components in an afternoon. I actually prepared and sprayed the Fuselage Service Bulletin 18-09-17 parts as well, but I’ll write a separate post about that when the parts are riveted in place.

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The inboard end of the Flap Fairing has a stiffener attached prior to installation. It’s not that obvious from the manual which way round this fits, but after zooming in on a PDF version of the manual I decided this was the way to go.

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As always, some JC5A on the faying surfaces.

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I squeezed the -4 rivets with the wing resting on its top surface. To save time reseting the squeezer gap, I did all similar size rivets on each wing.

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Then I flipped the wings over to squeeze the 426-3 rivets on the top skin.

Tricky Rivet!

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There are 2 rivets per wing which need a rivet gun due to restricted access near the inboard aileron hinge … see the two unset shop heads in this picture.

One of them, adjacent to the Wing Service Bulletin, is very awkward indeed … I’ve not decided yet how to set this fellow!

It’s very impressive how well Vans make all the parts fit … look at the fairing contour around the aileron hinge : )

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2 comments on 20-02 Flap & Aileron Gap Fairings
  1. Mike Collins

    How did you end up setting that tricky rivet that is so close to the large doubler (red arrow in your picture)?

  2. Steve

    Hi Mike … with my rivet partner Tim we simply used a tungsten bucking bar. Have a helper who can concentrate on the accurate bucking bar position. It set surprisingly well.

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