X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 07 May 2008 09:32:00 -0400 Message-ID: X-Original-Return-Path: Received: from web36907.mail.mud.yahoo.com ([209.191.85.75] verified) by logan.com (CommuniGate Pro SMTP 5.2.2) with SMTP id 2894649 for lml@lancaironline.net; Mon, 05 May 2008 15:58:21 -0400 Received: (qmail 5441 invoked by uid 60001); 5 May 2008 19:58:20 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type:Message-ID; b=43LtsJqG4I1/LlbKN69lmmHOYFQU0/M825vGmCNF+KAh9YYwPXZst7uOn0VlJzOWTFgk5qacUgtp7EepBHH9UzI4E8JCt0i47sXqg5AKCx9Dp4B33vAQbTMxxt5X9eQL4ovZQMGUkFReZSu8leP5frHmP3adZHpRb1QXlsL6/0U=; X-YMail-OSG: gmu8E_8VM1luCVjB1GabgJDYdyk.GaR0AzkAH65KuJpkmWDBRBineDJiXPuvMfH8Bw-- Received: from [209.225.224.254] by web36907.mail.mud.yahoo.com via HTTP; Mon, 05 May 2008 12:58:20 PDT X-Mailer: YahooMailRC/975.23 YahooMailWebService/0.7.185 X-Original-Date: Mon, 5 May 2008 12:58:20 -0700 (PDT) From: Chris Zavatson Subject: Re: [LML] Re: IVP down in Mesa, AZ, 3 souls lost X-Original-To: Lancair Mailing List MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1079344179-1210017500=:4969" X-Original-Message-ID: <512061.4969.qm@web36907.mail.mud.yahoo.com> --0-1079344179-1210017500=:4969 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Mark,=0A=A0=0A<>=0A=A0=0AIn the case of cont= amination where the Avgas is=A0diluted with Jet fuel, it can slip by comple= tely unnoticed.=A0 The light hue of blue is just slightly lighter.=A0 I los= t my first engine due to Jet fuel contamination.=A0 The FBO was pumping con= taminated fuel for three weeks before folks figured out what was going on.= =A0 The highest concentration of Jet Fuel was 12%.=A0 By the time I got the= bad gas it had been diluted by two more shipments of Avgas plus what ever = was left in my tanks.=A0 My engine was fed something under 5% Jet fuel.=A0 = The damage caused by that small amount of contamination caused=A0the insura= nce adjuster to opt for all out replacement rather than repair.=A0 180 engi= nes were damaged.=A0 The engines most sensitive to the contamination were t= urbocharged and those with high compression pistons.=A0 There were a few em= ergency landings, but no injuries.=A0 It would be interesting to know how m= uch jet fuel it would take before the average pilot could see or smell the difference.=A0 One thing is certain.=A0 The engine will notic= e long before the pilot.=0AWhat impressed me most was how little contaminat= ion could be so destructive.=0A=A0=0AChris Zavatson=0AN91CZ=0A360std=0Awww.= N91CZ.com=0A=0A=0A ___________________________________________________= _________________________________=0ABe a better friend, newshound, and =0Ak= now-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt= =3DAhu06i62sR8HDtDypao8Wcj9tAcJ --0-1079344179-1210017500=:4969 Content-Type: text/html; charset=us-ascii

Mark,

<<What color does 100LL turn if you mix in some Jet-A? Maybe we should add the "sniff test" to the preflight. We still take fuel samples as part of the preflight... right? >>

In the case of contamination where the Avgas is diluted with Jet fuel, it can slip by completely unnoticed. The light hue of blue is just slightly lighter. I lost my first engine due to Jet fuel contamination. The FBO was pumping contaminated fuel for three weeks before folks figured out what was going on. The highest concentration of Jet Fuel was 12%. By the time I got the bad gas it had been diluted by two more shipments of Avgas plus what ever was left in my tanks. My engine was fed something under 5% Jet fuel. The damage caused by that small amount of contamination caused the insurance adjuster to opt for all out replacement rather than repair. 180 engines were damaged. The engines most sensitive to the contamination were turbocharged and those with high compression pistons. There were a few emergency landings, but no injuries. It would be interesting to know how much jet fuel it would take before the average pilot could see or smell the difference. One thing is certain. The engine will notice long before the pilot.

What impressed me most was how little contamination could be so destructive.

Chris Zavatson

N91CZ

360std

Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. --0-1079344179-1210017500=:4969--