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Old 11-07-2021, 08:35 PM
Eztroller Eztroller is offline
Join Date: Dec 2012
Location: West Linn,Or
Posts: 97
Default Fuselage Flange 27-04

Step four says to "machine countersink the #30 and #30 holes in the left and fit the dimples in the firewall side.

I feel like I have had to go much deeper than recommended per the directions. Possibly because of the thicker material...? When I place the flanges on the firewall, there is still a gap and I can not get it to lay tight against the firewall. Visible space between the flange and firewall.

Last edited by Eztroller : 11-09-2021 at 07:39 AM.
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Old 11-07-2021, 09:42 PM
BravoAlphaRomeo BravoAlphaRomeo is offline
Join Date: Jan 2020
Location: Edgewood, KY
Posts: 23

To me that looks about right. When those rivets are set they pull in a little bit tighter. As Vans says, if you are countersinking so parts lay flat, you are going too deep. A very small gap means your dimple and countersink are locked together.

Anyway, just my thoughts…

172N 180HP
RV14A - under construction
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Old 11-08-2021, 09:42 PM
Eztroller Eztroller is offline
Join Date: Dec 2012
Location: West Linn,Or
Posts: 97

Thanks. Exactly what the factory said today.
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