Ira and Nigel,
I, too, have had two aluminum plates crack. The last was replaced with
a thin, stainless one, of my own manufacture (beat it out of a piece of
unused firewall material). No problems, so far...
Jeff - Baby Blue
247 hrs
nigel charles wrote:
> I had significant cracking on mine such that I had to replace it. A
> new plate and clamps cost me about 30 including postage. When I
> received the new one I noticed it had sharp edges and corners. I have
> rounded these to help stop further cracking. However I suspect that it
> really needs a plate made of stainless steel to cope with the heat.
>
>
>
> Nigel Charles
>
>
>
> -----Original Message-----
> From: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com] On Behalf Of
> irampil@notes.cc.sunysb.edu
> Sent: 18 December 2006 20:23
> To: europa-list@matronics.com
> Subject: Europa-List: Cracked aluminum plate on 912S muffler
>
>
>
>
> Greetings All,
>
> I just completed my annual condition inspection of N224XS
>
> I discover that the aluminum plate strapped atop the muffler was cracked
> bilaterally just inside its retaining straps starting forward and
> extending
> backward. I stop drilled them.
>
> Last year it was the muffler that cracked in several places in or near
> the down-
> pipe sockets. No problems there this year.
>
> Has anyone else seen this? Since there are no apparent structural
> pressures
> on this piece of aluminum, the cracks maybe related to thermal
> stress, i.e.,
> different coefficient of expansion of plate vs muffler to which it is
> bound.
>
> I just hate cracks in aircraft!
>
> Any thoughts?
>
> Ira N224XS
>
>
>
>
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