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 Post subject: Sedan AD 2012-04-10
PostPosted: Mon Jun 24, 2013 17:49 
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Joined: Wed Dec 08, 2004 16:49
Posts: 2389
Location: San Martin, California
Well now that all of the planes have been looked at, do we have some results of the inspection? I would assume that all of the Sedans have some surface corrosion. Was there a large number that had moderate or severe corrosion as called out in the AD?

There are a couple in the area that were looked at and not much was found. One owner opted to replace the spar caps due to some added drill holes but that was it. The Corona Sedan was trash but it wasn't airworthy, and who knows where it has been. I looked at it and there was no doubt it was corroded. It didn't have the added holes and they weren't needed, it was just a mess.

I'm just a little curious about the findings. Out here in CA the climate is pretty good and I don't see any of the problems that the AD called out.

Paul

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 Post subject: Re: Sedan AD 2012-04-10
PostPosted: Mon Jun 24, 2013 23:57 
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Joined: Fri Sep 14, 2012 18:12
Posts: 172
Location: North Pole AK
Paul:

I haven't done mine yet, but intend to within the next month. I will be using the AMOC with the boroscope. the scope cost less than the doublers and plates, and its a simple enough process. What I have looked at so far inside the tank bays and the aileron push tube bays has not revealed any damage. This one has been in the Fairbanks Ak area since it was new, even though sitting outside, the only corrosion issues I have are on the tailfeathers and were caused by shoddy maintenance. The last person to recover those surfaces forgot to put holes inside the drains, even though he did install the drain grommets.

Dik N1441H
Queen of the Berry Patch


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 Post subject: Re: Sedan AD 2012-04-10
PostPosted: Tue Jun 25, 2013 08:17 
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Joined: Thu Nov 11, 2004 11:01
Posts: 6026
Location: Phoenix Arizona
Paul,

I have inspected three Sedans and know of a handful of others and NOT ONE of them has had more than what could be described as "light surface corrosion" in several spots on the wings. We are talking about something that could be removed with very light rubbing with a scotchbrite pad.

Thanks for bringing this up, have wondered what really happened "out in the field" now that this AD/SB has for the most part been complied with and the real results are in. Right now am guessing that we know of less than 10 aircraft that had any real issue in this area.

Joe A


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 Post subject: Re: Sedan AD 2012-04-10
PostPosted: Tue Jun 25, 2013 18:41 
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Joined: Fri Nov 19, 2004 23:14
Posts: 73
Location: Fairbanks, Alaska
I finally got all the inspection holes cut in my wings. I've only inspected a couple of bays but so far things look pretty good.


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 Post subject: Re: Sedan AD 2012-04-10
PostPosted: Mon Jul 01, 2013 08:46 
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Joined: Thu Nov 11, 2004 11:01
Posts: 6026
Location: Phoenix Arizona
Hmm, interesting.

So far 85 people have viewed this thead and not one person who has posted has had any issues.

If this is the case then what was this AD/SB all for? If there is no problem with the Sedan wings, why are we now having to do this extensive inspection every year, and spray ACF-50 in the wings every two years? Someone have stock in inspection covers, bore-scopes or ACF-50?


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 Post subject: Re: Sedan AD 2012-04-10
PostPosted: Tue Jul 02, 2013 17:46 
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Joined: Fri Feb 24, 2006 16:14
Posts: 2
Location: South Dakota
inspected my wings and they are free corrosion.


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 Post subject: Re: Sedan AD 2012-04-10
PostPosted: Wed Jul 10, 2013 12:36 
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Joined: Sun Mar 27, 2005 07:57
Posts: 313
Location: Switzerland
Since N1331H's wings had been open and treated with ACF-50, during the restoration that was completed in 2010, I already knew I would not encounter any corrosion issues, when the AD came out. Nevertheless, I look at the work needed to create access to the wings' D-boxes as an investment into the long-term preservation of these wonderful machines. I do admit, it is an expensive one.

Matt

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Aeronca 15AC Sedan – Restoring and flying the classic 4-seater: http://www.n1331h.com


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 Post subject: Re: Sedan AD 2012-04-10
PostPosted: Wed Jul 10, 2013 13:24 
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Joined: Thu Nov 11, 2004 11:01
Posts: 6026
Location: Phoenix Arizona
As well Matt,

You took photos of the work on the wings which now documents their condition and thats a big help!

Joe A


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