Today's Message Index:
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1. 01:21 AM - Re: Metal-to-metal bonding (teamgrumman@aol.com)
2. 08:11 PM - Re: 4371 magneto (teamgrumman@AOL.COM)
Message 1
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| Subject: | Re: Metal-to-metal bonding |
Hi Ian, The DER with whom I am working (one of them) is a structural
engineer. He is really into current methods of metal-to-metal bonding.
I need the previous hot bonding specs so we can make a 'same form,
fit, and function' comparison. I'll check out the .pdf you referenced
and see if that helps me.
Thanks a bunch.
Gary
-----Original Message-----
From: i.r.m@btinternet.com
Sent: Wed, 9 May 2007 3:12 PM
Subject: Re: TeamGrumman-List: Metal-to-metal bonding
On my tour of Chem Fab they said they used Hysol 9309 Epoxy paste
http://www.loctite.com/int_henkel/loctite/binarydata/pdf/Hysol_EA_9309_3NA.pdffor
cold bonding to fill any after bonding voids or in areas where hot
bonding wasn't needed or couldn't be done. I assume you are talking
about cold bonding. >From what they were saying to get anyapproval at
that time for using this stuff for field repairs was almost impossible
due to the stringent controls on preparation and proper priming of the
surfaces. I did ask them if it was going to be possible to use it for
bond repairs and they indicated it would most likely be included in
Tiger's maintenance manual once they had their production certificate,
but I never saw it produced.
Ian
MatAir
----- Original Message ----- From: teamgrumman@aol.com
To: teamgrumman-list@matronics.com
Sent: Wednesday, May 09, 2007 7:32 PM
Subject: TeamGrumman-List: Metal-to-metal bonding
I'm in the process of getting an STC to repair the horizontal bracing
using an approved metal-to-metal bonding similar to that used to make
the part in the first place. This wll eliminate the row of rivets down
the side. Plus, the fuel tank sealant currently being used is not a
bonding agent and the rivets being used are only a fraction of the
strength of the original bonding.
Does anyone know what the name, maunfacture, and the bonding strength
characteristics (shear and tensile strengths) of the bonding material
used in our planes? A lot has happened since metal-to-metal bonding of
our planes began. Today, there are several approved procedures. I
just need to find one that meets or exceeds the original specifications.
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Message 2
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| Subject: | Re: 4371 magneto |
I got anohter new mag today. It's an 0704xxxx series magneto. I
installed the gear just like I thought it should be. Everything looks
good. Now all I need is a few days to finish resealing the tank Then
I'll be done; with this one. It's taken a lot of lipstick and polish,
but, at least it's airworthy.
Gary
-----Original Message-----
From: flyv35b@minetfiber.com
Sent: Thu, 10 May 2007 9:28 AM
Subject: Re: TeamGrumman-List: 4371 magneto
Gary, send me a photo of the mag.
Thanks,
Cliff
----- Original Message ----- From: <teamgrumman@aol.com>
To: <teamgrumman-list@matronics.com>; <engines-list@matronics.com>
Sent: Thursday, May 03, 2007 11:28 AM
Subject: TeamGrumman-List: 4371 magneto
>
> About a month ago I got a new 4371 to install on a customers plane.
When > I installed the nut, it locked up the whole impulse coupling
mechanism. I > took some measurements on the new one and compared it to
the old one. It > had been manufactured wrong. When I tried to return
it (to Aircraft > Spruce), I was given a run-around for 3 days. They
wanted me to talk to > someone in the technical department at Unison to
see if I'd installed it > in the plane wrong. They (Aircraft Spruce )
couldn't believe I found a > manufacturing defect BEFORE it was
installed. I made 30 phone calls to > Unison over two days and never
got a reply back. Aircraft Spruce finally > just sent me a new mag (I'd
already returned the first new mag).
>
> I got the second new mag yesterday. It's also F'd U. I called Unison
5 > times yesterday without anyone answering my call. I finally got
Aircraft > Spruce to go through their supplier. Gee, they found out
that pretty much > all of the mags made since GE took over have been
manufactured wrong. In > the mean time, the next batch of mags is due
in June.
>
> I took a bunch of pics showing the defect just in case someone
wanted to > see it. Sending them now to Aircraft Spruce.
>
________________________________________________________________________
> from AOL at AOL.com.
>
>
>
>
>
>
269.6.2/787 - Release Date: 5/3/2007 2:11 PM
>
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