SECTION 26: MID FUSE RIBS & BOTTOM SKINS

Build Instruction Updates

• 10/05/21 26_10.pdf

Check for more recent updates here

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If you have part F-1016D (seatbelt strap) with an extra tab on the side and two additional holes but your manual depicts that part without flanges/extra holes, you are experiencing the transition from the old flap motor to the new flap motor where the tab is no longer needed. Your manual is a new version but Vans sent you the older part with the tab. According to Vans, just remove the tab and match drill the two extra holes and use same rivets as the other surrounding holes. For details, see this FB thread (FB Link 3/28/2022) and (FB Link 4/1/2022)
If your plans don't match what you have, check the electronic version of the plans which should show up under your name in the vans store. If for some reason, the electronic version still doesn't match what you have, try File:26 10.pdf.

Step 6 gotcha (Step 7 on V2 of 7/16/21 of the page): Plans call for 'Dimple the screw holes in the inboard flange of the seat rib intercostals that correspond to the flush nut plates...' Note that there are 3 nut plates on this flange, but only 2 of them are flush nut plates. The top nut plate is a K1000-08 and must not have its screw hole dimpled.

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Consider at this point whether you need access holes in the F-1017 under-seat ribs for conduit and/or antenna wiring. Many builders cut holes in the F-1017 ribs for conduit passthroughs. These holes will be much easier to cut at this point.

Also consider marking and cutting/installing antenna doublers on the bottom skins in this general section. This will be much easier now than later, when the seat plates are permanently riveted in place.

If you haven't updated your plans in a while, ensure you dimple the #40 holes in the web of F-1015A. There was a revision on page 26-5 in July of 2021 that added this step. These dimples will match with dimples in the F-1070-L and -R Mid Side Skins (Section 29-17). The front flange of F-1015A is not riveted to the F-1004D-L/R Center Section Bulkhead at this time; that is done when the Mid Side Skins are attached.

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Double check that the left and right WD-1008-L / WD-1008-R step weldment parts are labelled correctly by Vans. There are two reports of them being swapped. See also FB Post 4/6/2022.