From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: Fuel Fitting Thread Sealant
To: lml
Date: Tue, 14 Sep 2004 13:58:20 -0400
Message-ID: <web-410611@logan.com>
In-Reply-To: <112A7B9C262ED511AB1700508BDC76C50EEB7CA3@ehost001.intermedia.net>
References: <112A7B9C262ED511AB1700508BDC76C50EEB7CA3@ehost001.intermedia.net>
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Posted for "John W. Cox" <johnwcox@pacificnw.com>:

  John in the last several days there have been a number of posts which
  skirted a direct answer to your query.  I believe there is not a single DAR
  who would approve a kit built aircraft for flight with the use of "any fuel
  line thread sealant compound".  (Whether that be Locktite 245, Teflon tape,
  or Baker Seal.)
  
  The AC 43-131B on page 8-22, paragraph 8-38 FUEL SYSTEM PRECAUTIONS.
  Subparagraph f.  Do not use Teflon tape on any fuel lines to avoid getting
  tape between the flare and fitting, which can cause fluid leaks.
  
  
  Mike Easley says he uses Teflon tape.
  
  Dan Schaefer N235SP says "he used Baker Seal from ACS"
  
  Charlie K put it best "using anything on flared fittings is not wise".
  
  I wont speculate on what Brent recently said about deviation from a proven
  design but since I am still sensitive over the loss of Chuck Brenner would
  you guys be willing to listen, or go talk to either a DAR or an IA as to the
  above recommended courses of action.
  
  I went to A&P school and got my ticket just to reduce these frequency of
  mods so common. I was taught that there is a defining reason why flare seats
  on aircraft are 37.5 degrees vs. 45 degree automotive style flares and that
  no compound of any source or type is ever used on fuel lines.  Here is my
  answer to your question. NONE!
  
  John Cox A&P