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Filliform looks like?

 
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rv9jim(at)juno.com
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PostPosted: Sat Sep 22, 2007 11:12 am    Post subject: Filliform looks like? Reply with quote

I have just pulled out my wing root fairings (p/n F999 ) and pulled the
blue skin from the underside of the fairing. It looks like there is some
form of "corrosion" that looks like a fuzzy worm that snakes around from
an edge. It is only on my wing root fairings and is covering the one
edge of the fairing where the factory holes are located. Both fairings
have this condition. If it is the "filliform" corrosion, can I
eliminate it from the part? if so, how is the best way? If it is left
as is, since this a nonstructural part, will it contaminate any other
parts such as my wing skins? Its one of those "got to know about this"
items.

Jim Nelson
RV9-A


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Vinnfizz(at)aol.com
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PostPosted: Sat Sep 22, 2007 3:48 pm    Post subject: Filliform looks like? Reply with quote

Check out this link for examples. The second link shows a time lapse of filliform growing. Pretty neat!






http://www.asnt.org/publications/Materialseval/basics/oct03basics/oct03basicsfig1.htm#fig1a



http://aluminium.matter.org.uk/content/html/eng/default.asp?catid=180&pageid=2144416691


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Vinnfizz(at)aol.com
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PostPosted: Sat Sep 22, 2007 4:00 pm    Post subject: Filliform looks like? Reply with quote

Jim,

Best bet would to apply some elbow grease to it with Scotch Brite pads , a little Alumaprep acid etch, Alodyne and followed by your favorite primer then the part will have the best chance to endure and to ensure no chance of contributing to more corrosion. As they say "airplanes are Bio-Degradable. Everything the plane comes into contact with will cause corrosion of one form or another if left unchecked. Protect it best you can.



Ed Flow

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kearney(at)shaw.ca
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PostPosted: Sat Sep 22, 2007 10:22 pm    Post subject: Filliform looks like? Reply with quote

Jim

I had the same problem on one of the pats of my -10 tail cone. I just called
Van's and they sent a replacement part. Their initial suggestion was to
scotch brite the corrosion out. I found that I was taking too much material
off (for my comfort) and decided to ask for a replacement part.

They were very good about it.

Cheers

Les Kearney
RV10 - # 40643

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