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11-27-2012, 08:11 PM
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Join Date: Dec 2008
Location: Lacey, WA
Posts: 1,365
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Actually Wayne, aviation brake fluid is a hydraulic oil and not the same evil stuff that you put in your car. It doesn't take off paint. You did use the right stuff, right?
Tony
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Tony
E-LSA RV-12 ULS
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11-27-2012, 10:16 PM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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Quote:
Originally Posted by yankee-flyer
Next question is how to drain the brake lines so they can be disconnected without dripping fluid inside the fuselage.
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The process described in the S.B. instructions actually works quite well.....
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11-27-2012, 11:31 PM
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Join Date: Nov 2010
Location: Livermore, CA
Posts: 124
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SB 12-11-09 Posted
The 30 page SB 12-11-09 is now posted on Van's web site.
http://www.vansaircraft.com/pdf/sb12-11-09.pdf
I am right at the point where I was going to attach the landing geat and of course I'm waiting for the upgrade kit. Maybe in time for a Christmas present.
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Joe Arluck
Livermore, CA
RV-12, S/N 120419
Empennage/Tailcone finished
Wings finished
Most of Finishing Kit finished
"It's sitting on the Landing Gear"
Engine mostly installed
Avionics Kit in Hand
Currently fitting wings
Paid 2018
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11-28-2012, 04:44 AM
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Join Date: Feb 2010
Location: Perth, Western Australia
Posts: 1,647
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Quote:
Originally Posted by LittleJoeA
The 30 page SB 12-11-09 is now posted on Van's web site.
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I can't see any mention in the SB 12-11-9 documentation about the slight step that I and a number of others have reported at the inner edge of the cutout in the channel for the AN5-22A attach bolts. The step prevents the washer under the nut from bearing uniformly against the flat face of the channel. Is this not considered to be a problem?
I raised this with Vans some time ago and was told to file it flat, but that is simply not practical in the confined space available, and certainly not with any accuracy.
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rgmwa
RV-12LR 912ULS
120346
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11-28-2012, 06:21 AM
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Join Date: May 2008
Location: Arlington, Texas
Posts: 127
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Step in C-Section Observations
It is my understanding that the SB fix has taken the "step" issue out of the problem. It is also (IMHO) why the doublers are located on the bottom of the C-Section instead of the top of the C-Section which would have been an easier installation. I have noticed from the photos of C-Section cracks (Fig 16 of the SB for example) that all of them appear to have a "step" in the bolt hole cut-out area. I have a step at all 4 bolt hole cut-outs and have 2 cracks at the right forward bolt hole and 1 crack at the left forward bolt hole. The "step" may not be the only reason that some of us have cracks but I do believe that it is a significant contributor to our landing gear damage. Maybe a "structures guy" could comment on my speculation. I have received the SB Kit and it looks stout! Bob Kibby "N712BK"
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11-28-2012, 10:52 AM
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Join Date: Aug 2005
Posts: 845
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Page 16 of 30
Step 32: Add bevels to the four corners of the U-1202 Outboard Main Gear Attach Brackets.
Has anyone done this yet, and if so, how? My first inclination is to take the grinding wheel to it, but my first inclination is almost always wrong.
Problem here is that I don't have a Plan B.
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Dave Gamble
Grove City, OH
RV-6 N466PG Purchased already flying - SOLD!
The Book: The PapaGolf Chronicles
Built RV-12
http://www.schmetterlingaviation.com
The Book: Being written.
The above web blogs and any links provided thereto are not instructional or advisory in nature. They merely seek to share my experiences in building and flying Van's RV airplanes.
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11-28-2012, 11:11 AM
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Join Date: Mar 2009
Location: Netherlands
Posts: 663
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I taped off the 1/4" and used a grinding wheel. I polished the corners with a file and the scotch brite wheel.

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11-28-2012, 11:14 AM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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Quote:
Originally Posted by Dgamble
Step 32: Add bevels to the four corners of the U-1202 Outboard Main Gear Attach Brackets.
Has anyone done this yet, and if so, how? My first inclination is to take the grinding wheel to it, but my first inclination is almost always wrong.
Problem here is that I don't have a Plan B.
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A somewhat course belt (60 - 80 grit) on a belt sander will work quite well (if you are not in a huge hurry). Have a container of water to dip the parts in occasionally to keep them from getting excessively hot.
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11-28-2012, 11:41 AM
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Join Date: Oct 2010
Location: La Feria Texas
Posts: 3,822
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I see that people with cracks in the center channel have to stop drill them, then take photos and send to Vans for instructions. I hope those who do this share the "fix" from Vans.
I am still dreaming of a method to smooth that lip easily.
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11-28-2012, 11:47 AM
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Join Date: Feb 2010
Location: Perth, Western Australia
Posts: 1,647
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Quote:
Originally Posted by Bob Kibby
It is my understanding that the SB fix has taken the "step" issue out of the problem. It is also (IMHO) why the doublers are located on the bottom of the C-Section instead of the top of the C-Section which would have been an easier installation. I have noticed from the photos of C-Section cracks (Fig 16 of the SB for example) that all of them appear to have a "step" in the bolt hole cut-out area. I have a step at all 4 bolt hole cut-outs and have 2 cracks at the right forward bolt hole and 1 crack at the left forward bolt hole. The "step" may not be the only reason that some of us have cracks but I do believe that it is a significant contributor to our landing gear damage. Maybe a "structures guy" could comment on my speculation. I have received the SB Kit and it looks stout! Bob Kibby "N712BK"
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That's what I was expecting, but I can't get my fuzzy "structures" head around how this takes the step issue out of it (home with the flu).  I'll go back and have another look.
__________________
rgmwa
RV-12LR 912ULS
120346
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