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Administrator
Re: SB 819 Fuselage Door Frame Corrosion
That is what it looks like happened Mark. It migrated into the next tube and corroded it also.
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Re: SB 819 Fuselage Door Frame Corrosion
Yes Mark when I read your post, I had an idea that you were on to something here.
To answer my own question Steve, applying Marks theory, I'm willing to stick my neck out
on the "creative welding" I asked about. It looks like water collected there, froze, split the tube and someone
closed it up and welded a patch over it.
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Re: SB 819 Fuselage Door Frame Corrosion
Being from Upstate New York (and I don't mean "Fishkill", just outside of "the City"... I mean UP NORTH!), I see this damage much more than I would like to. Often on airplanes that it's a cryin' shame to have to take the IA knife to, to fix!!! Split tubes (and "swelled up" tubes, as well). Yep. C'est la guerre. That's what that is...freeze damage.
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Re: SB 819 Fuselage Door Frame Corrosion
I've been reading about the horror stories of SB 819 for years now and I think its a must do item! I have not had the opportunity to restore a short wing yet so i don't have any experience in doing the job--Yet. Question from those who have C/W SB 819. How do you reweld the door frames back on and not burn off the primer you just put on?
Thanks,Great Forum
Mikey
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Re: SB 819 Fuselage Door Frame Corrosion
3M makes a weldable primer in a spray can. Welders hate it but it works. It does cause some sparking and smoking when you tig weld the sheet metal back on but it appears to work. We painted the tubing and the back side of the sheet metal with it prior to welding the sheet metal back on.
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Administrator
Re: SB 819 Fuselage Door Frame Corrosion
Another problem area I keep finding is in the wing root area of the fuselage where the wing root fairing screws to the fuselage frame. Water gets trapped in the trailing edge channel and the 3/8" channel and rusts the upper longeron. We are going to make the trailing edge piece out of a solid piece of material and fill the 3/8" channel with something. Hopefully between these fixes and a good two part epoxy primer and catalyzed polyurethane paint this will no longer be an issue on this Pacer.
Trailing edge of wing root.
[attachment=2:3c0pelcx]100_2544 (Medium).JPG[/attachment:3c0pelcx]
3/8" Channel making the wing root fairing attach.
100_0749.jpg
Top longeron repaired by inner sleeve method. The inside of this tube was like brand new. The corrosion was from the outside in.
[attachment=1:3c0pelcx]100_2553 (Medium).JPG[/attachment:3c0pelcx]
Last edited by Steve Pierce; 01-25-2012 at 07:20 PM.
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Re: SB 819 Fuselage Door Frame Corrosion
My Clipper was rotted out there as well.
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Sb 819
Hi Folks,
Is there a downloadable copy of this service bulletin here on the site somewhere or does someone have it in PDF form that I might get a copy of?
I am (finally) beginning the restoration of my PA-22 and I want to be certain I check this one out as I've read some horror stories here on the site and others have recommended I do it, as well. I will be glass beading the fuselage, so it will be a good opportunity to check on this sort of thing.
Thanks a lot for your help and input!!
Michael
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Administrator
Re: Sb 819
Second page of this thread. http://www.shortwingpipers.org/forum...ighlight=SB819
I merged the threads together.
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