X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 29 May 2007 08:42:58 -0400 Message-ID: X-Original-Return-Path: Received: from [216.200.145.36] (HELO omta09.mta.everyone.net) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTP id 2072436 for lml@lancaironline.net; Tue, 29 May 2007 07:22:28 -0400 Received-SPF: none receiver=logan.com; client-ip=216.200.145.36; envelope-from=bknotts@buckeye-express.com Received: from pop15.mta.everyone.net (bigiplb-dsnat [172.16.0.19]) by omta09.mta.everyone.net (Postfix) with ESMTP id 3670B40757 for ; Tue, 29 May 2007 04:21:49 -0700 (PDT) X-Eon-Dm: pop15 Received: by pop15.mta.everyone.net (EON-AUTHRELAY2 - 48f07edd) id pop15.4654e56c.e849b for ; Tue, 29 May 2007 04:21:48 -0700 X-Eon-Sig: AQK8DXBGXAzMr+CDjgIAAAAB,2c7d148a4fd03164315caea7308f1c31 X-Original-Message-ID: <465C0CF8.5000101@buckeye-express.com> X-Original-Date: Tue, 29 May 2007 07:22:32 -0400 From: "F. Barry Knotts" Reply-To: bknotts884@earthlink.net User-Agent: Thunderbird 1.5.0.10 (Windows/20070221) MIME-Version: 1.0 X-Original-To: Lancair Mailing List Subject: Re: [LML] LIVP Turbo Air Changes after ~2 Hours Cross County References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------050801030500030600030101" This is a multi-part message in MIME format. --------------050801030500030600030101 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Jeffrey Liegner, MD wrote: > I've taken two longer cross country flights >3 hrs) lately and have > experienced a change in turbo air temp suddenly after ~2 hours flight > time. It has happend four times now, so there seems to be a pattern. > Jeff, just a thought. I've had defective SCEET tubing delaminate and internally collapse producing an intermittent pressurization problem on my Cessna. Once collapsed, it would stay that way until shutdown, then be OK on startup until the next random time it happened. The problem could not be seen from the outside of the tube. Replacement of the tube (done in desperation) cured the problem and the postmortem on the tubing, with it straightened out and peering down the interior of the tube, revealed what had been happening. Some of the troubleshooting ideas given before should help to isolate the problem to the tubing coming into the mixer box. Good luck! Let us know what you find. Barry Knotts LIV-P, Conti TSIO-550, Perrysburg, OH, abuilding.... --------------050801030500030600030101 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Jeffrey Liegner, MD wrote:

LIVP Turbo Air Changes after ~2 Hours Cross County
I've taken two longer cross country flights >3 hrs) lately and have experienced a change in turbo air temp suddenly after ~2 hours flight time. It has happend four times now, so there seems to be a pattern.

Jeff, just a thought. I've had defective SCEET tubing delaminate and internally collapse producing an intermittent pressurization problem on my Cessna. Once collapsed, it would stay that way until shutdown, then be OK on startup until the next random time it happened. The problem could not be seen from the outside of the tube. Replacement of the tube (done in desperation) cured the problem and the postmortem on the tubing, with it straightened out and peering down the interior of the tube, revealed what had been happening. Some of the troubleshooting ideas given before should help to isolate the problem to the tubing coming into the mixer box.

Good luck! Let us know what you find.

Barry Knotts
LIV-P, Conti TSIO-550, Perrysburg, OH, abuilding....

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