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  #1  
Old 05-17-2020, 10:43 AM
jamjac jamjac is offline
 
Join Date: Jan 2019
Location: apple valley, ca
Posts: 3
Default RV-6A fuel tank

I am trying to remove a leaking fuel tank on an RV-6A. I have removed all the screws in the wing, the fuel fittings and the bolt at the leading edge. It will not move. Am I missing something.

I am an A&P but this is the first time I have worked on an RV to this extent.
Any help is appreciated
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  #2  
Old 05-17-2020, 10:58 AM
RVDan RVDan is offline
 
Join Date: Jun 2012
Location: Frederick, MD
Posts: 901
Default

There is the root fitting At the leading edge in addition to the skin screws and that should be it. Paint Or corrosion? Unless someone ?improved on the plans?. One fuel supply line and vent line. Wire for fuel qty sender
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  #3  
Old 05-17-2020, 11:03 AM
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Mel Mel is offline
 
Join Date: Mar 2005
Location: Dallas area
Posts: 10,985
Default

Quote:
Originally Posted by jamjac View Post
I am trying to remove a leaking fuel tank on an RV-6A. I have removed all the screws in the wing, the fuel fittings and the bolt at the leading edge. It will not move. Am I missing something.
I am an A&P but this is the first time I have worked on an RV to this extent.
Any help is appreciated
Two things can make this a difficult procedure. First, as I'm sure aware of, is paint.
The other is that the dimpled screw holes are seated into the countersunk spar. Sometimes these can hold very tightly.
There should be nothing else holding the tank on.
Later models such as the RV-7 & -8 have "Z" brackets bolted to the spar, but unless the builder has modified, the -6 does not have these. If the builder did add these, evidence would be inspections covers on the bottom just aft of the spar.
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  #4  
Old 05-17-2020, 11:15 AM
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RONSIM RONSIM is offline
 
Join Date: Feb 2008
Location: Largo, FL
Posts: 1,056
Default Popsicle sticks to lift countersinks

I had to use popsicle sticks under the back edges, top and bottom, to relieve the countersinks (dimples) from the spar.

Ron
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  #5  
Old 05-17-2020, 12:39 PM
jamjac jamjac is offline
 
Join Date: Jan 2019
Location: apple valley, ca
Posts: 3
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Thanks,
I will check to see if that is what is holding the tank on,

Jamjac
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  #6  
Old 05-17-2020, 08:12 PM
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Pmoran Pmoran is offline
 
Join Date: Apr 2015
Location: Onalaska, Wisconsin
Posts: 42
Default Pictures if possible

If possible, could you post some pictures to show what you’ve done from a couple different angles?

If not, I understand. I’m curious as to what you’re looking at and I didn’t build the 6A I’m flying. It has inspection panels underneath.

Thanks,
Pat

Last edited by Pmoran : 05-17-2020 at 08:16 PM.
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  #7  
Old 05-17-2020, 10:51 PM
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az_gila az_gila is offline
 
Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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Quote:
Originally Posted by Pmoran View Post
.....It has inspection panels underneath.

Thanks,
Pat
Hopefully those inspection panels are not in the fuel tank area....
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  #8  
Old 05-17-2020, 11:08 PM
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PaulvS PaulvS is offline
 
Join Date: Aug 2019
Location: Western Australia
Posts: 565
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Inspection panels for access to aileron bellcranks?

The tanks are attached at the leading edge to the fuselage via an angle bracket (T-405), it sounds like you have taken out that bolt.
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Last edited by PaulvS : 05-17-2020 at 11:14 PM.
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  #9  
Old 05-18-2020, 09:41 AM
pa38112 pa38112 is offline
 
Join Date: Mar 2008
Location: Clarksboro, NJ
Posts: 927
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I bought some ceder shims at Home Depot, then put some Teflon tape on the thinnest of them. This makes an excellent tool for working the tank skin out of the dimples. The dimples hold the tank incredibly tight.
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  #10  
Old 05-19-2020, 10:18 AM
abwaldal@gmail.com abwaldal@gmail.com is offline
 
Join Date: Jan 2017
Location: Battle Ground WA
Posts: 186
Default tank removal

Another shim/wedge idea is if you have a granite slab production shop anywhere near you. You can go there and see if they have any plastic horse shoe shaped deck shims. They are designed to a knife point for shimming granite slabs. Very sharp knife point and plastic so no damage and easy to remove. You can tie a string on them to pull back out in slab work.
Not all shops use them so it might not be easy to find them. Amazon does not.
But, I will say Home Depot carries a 1/4" wide 1 1/4" long plastic knife point shim for tile work. A couple hundred in a tub.
I have used them for 40 years in the custom home construction business I retired from.
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