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Old 03-26-2020, 07:52 AM
Mudfly Mudfly is offline
Join Date: Dec 2011
Location: Alpharetta, Ga
Posts: 218
Default Firewall Vent Assembly

I recently completed the assembly and installation of the two vent assemblies in section 28 of the fuselage kit for my 14A project. However, while looking through the revision updates on the Vans website, it appears the vent assembly gets modified in section 48. The attached picture is from page 48-04. It shows two blind rivets that need to be drilled out, and the installation of a cover plate (FF-00084) that is sealed with RTV.
I thought this may be a mod for the tail dragger only, but it is tough to tell not having that set of plans yet.
It seems it would be much easier to make that modification now, since everything is easily accessible, than to wait until later when the engine is mounted.
For those that have completed this section, can you help me with the "big picture"?

Pic should be here.

Shawn Edwards
RV-14A (140174)
2021 VAF Donation

Last edited by Mudfly : 03-26-2020 at 07:54 AM.
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Old 03-26-2020, 01:36 PM
MED MED is offline
Join Date: Jul 2015
Location: Aiken, SC
Posts: 829

It is a straight-forward modification to add a closure plate to the co-pilot side vent before installing the engine mount. The closure plate keeps all of the heated air in the heater pipes so the pilot side can get some of it. Without the mod, the heated air would all dump overboard at the co-pilot side. It would be difficult or maybe impossible to access it for installation later.
Miss March 2020
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Old 03-26-2020, 07:43 PM
mulde35d's Avatar
mulde35d mulde35d is offline
Join Date: Dec 2017
Location: Clarksville, TN
Posts: 242
Default Do it early

Good work reading ahead. You should absolutely install this cover plate during the initial installation of the co-pilots vent to the firewall if you haven't reached that point yet. No reason to drill out rivets and do work twice. I did it this way and had no issues later in the build. This does however require you to order the cover plate early since it normally comes with the finish kit but is best installed early with the rest of the vent that comes in the fuselage kit.
Make sure to seal it up nice and tight with RTV as well.
RV-14A Sold
RV-10 Empennage - Searching
Wing - On Order

Last edited by mulde35d : 03-26-2020 at 07:46 PM.
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Old 03-26-2020, 08:16 PM
Mudfly Mudfly is offline
Join Date: Dec 2011
Location: Alpharetta, Ga
Posts: 218

Thanks Med for explaining the purpose of the closure plate. Tough to visualize when you don't have the system installed yet. Makes sense now.
Jon, I' just installed my vent assembly on the firewall so still easy to make the change. Wish I would have caught this before so wouldn't have to modify in place. I will add the closure plate to my next vans order. Not sure why the closure plate is not included in the fuselage kit so you could install during fabrication in section 28.
Shawn Edwards
RV-14A (140174)
2021 VAF Donation
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