X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 15 Dec 2009 16:33:59 -0500 Message-ID: X-Original-Return-Path: Received: from elasmtp-curtail.atl.sa.earthlink.net ([209.86.89.64] verified) by logan.com (CommuniGate Pro SMTP 5.3c3) with ESMTP id 4022439 for lml@lancaironline.net; Tue, 15 Dec 2009 15:57:53 -0500 Received-SPF: none receiver=logan.com; client-ip=209.86.89.64; envelope-from=btsim1@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=Uuvf3PV/fHkgg0/GS6G8goUBVzqKyB56c3pyhK8vH+lSIoqfRMycNQPQOFPLJDXU; h=Message-ID:Date:From:Reply-To:To:Subject:Mime-Version:Content-Transfer-Encoding:X-Mailer:Content-Type:X-ELNK-Trace:X-Originating-IP; Received: from [209.86.224.48] (helo=elwamui-rustique.atl.sa.earthlink.net) by elasmtp-curtail.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1NKeSL-0006J1-MU for lml@lancaironline.net; Tue, 15 Dec 2009 15:57:17 -0500 Received: from 74.242.161.216 by webmail.earthlink.net with HTTP; Tue, 15 Dec 2009 15:57:17 -0500 X-Original-Message-ID: <18700513.1260910637690.JavaMail.root@elwamui-rustique.atl.sa.earthlink.net> X-Original-Date: Tue, 15 Dec 2009 15:57:17 -0500 (EST) From: Brad & Tracy Simmons Reply-To: Brad & Tracy Simmons X-Original-To: Lancair Mailing List Subject: Re: [LML] Firewall Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Mailer: EarthLink Zoo Mail 1.0 Content-Type: text/html; charset=UTF-8 X-ELNK-Trace: 8c2ad83b7b2873c294f5150ab1c16ac0da8416a47843923996f98c5649cb62a49c6dad4d8423a026350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 209.86.224.48

We are in the process of repairing a IVP engine fire that was centered o= n the passenger aft side of the engine compartment, and the firewall blanke= t just barely did it's job. There is signifigant scorching around the perim= eter, through every penetration, and around the cowl attach flange.

 

Brad Simmons

Airframes Inc.

Milan, TN


-----Original Message-----
From: Charlie Kohler
Sent: Dec 15, 2009 1:37 PM
To: lml@lancaironline.n= et
Subject: [LML] Firewall

In the "for what it's worth column"--

     Subject: firewall blanket protection.

 

Several months ago I was removing my exhaust system for top overhaul/Jet= Hot coatings and was particularly interested in my firewall blanket and se= veral areas of the aluminized coating had come loose and or off. I started = to remove some of it and I discovered that BEHIND a perfectly normal piece = of the blanket I had a blackened/totally charred 6 inch in diameter piece o= f pre-preg firewall.

My analysis was that during an exhaust crack event well over a year ago = had sprayed exhaust on the firewall blanket from a distance of about 14 inc= hes and while the blanket had not discolored or gave any indicati= on of thermal distress--the pre-preg behind it had not fared well at all. <= /P>

After repairing the pre-preg I repaired the original blanket and put a 2= 000=C2=B0 Thermo-Tec blanket on top. I have since tested that combination--= and I am not too pleased.

I would have to say that the blanket protection we have is marginal at b= est. While my cracked exhaust event was probably in the neighborhood of two= hours or more exposure-- I sincerely think we need to have a indication of= what is going on in our assessory section. We need to have a system that i= s error and false alarm -free. A verification system of some sort to preven= t panic/overreaction.

I am currently looking at--

http:= //www.acroname.com/robotics/parts/R67-UVTRON.html

backed up (verified) by a standard outside air temperature gauge placed = in gascolator area.

 

Anyone have a better idea?


 
Charlie K.
 
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