X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 05 Jul 2006 11:03:11 -0400 Message-ID: X-Original-Return-Path: Received: from mta-out-1.udlp.com ([207.109.1.8] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1224468 for lml@lancaironline.net; Wed, 05 Jul 2006 09:40:41 -0400 Received-SPF: none receiver=logan.com; client-ip=207.109.1.8; envelope-from=Christopher.Zavatson@baesystems.com Received: from mnexch01.MSGDOMAIN.MPLS.UDLP.COM ([10.1.62.20]) by mta-out-1.udlp.com (8.13.6/8.13.6) with ESMTP id k65D1jZP003316 for ; Wed, 5 Jul 2006 08:01:45 -0500 Received: from smtp.udlp.com ([10.1.62.22] RDNS failed) by mnexch01.MSGDOMAIN.MPLS.UDLP.COM with Microsoft SMTPSVC(6.0.3790.211); Wed, 5 Jul 2006 08:33:43 -0500 Received: from DM-MN-06-MTA by smtp.udlp.com with Novell_GroupWise; Wed, 05 Jul 2006 08:39:37 -0500 X-Original-Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.5.6 X-Original-Date: Wed, 05 Jul 2006 08:39:17 -0500 From: "Christopher Zavatson" X-Original-To: Subject: Re: [LML] LNC2 Hydraulic problem Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=__Part5376B115.0__=" X-OriginalArrivalTime: 05 Jul 2006 13:33:43.0224 (UTC) FILETIME=[A23DC380:01C6A037] --=__Part5376B115.0__= Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Matt, Does your pump ever cycle in the down position? What is the pressure reading immediately after a normal gear extension? 1200 psi is quite high for the down side. While not the root cause of your problem, this pressure is high enough to trigger the high side pressure switch. I am curious how much of this pressure is caused by pressure switch and relief valve settings and how much by thermal influence. With the plane on the ground it is normal to see low side circuit will go up and down in pressure with changes in ambient temperature. The high side should remain at or near zero though. Chris Chris Zavatson N91CZ 360 std www.N91CZ.com --=__Part5376B115.0__= Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Description: HTML
Matt,
Does your pump ever cycle in the down position?  What is the = pressure reading immediately after a normal gear extension?  1200 psi = is quite high for the down side.  While not the root cause of your = problem, this pressure is high enough to trigger the high side pressure = switch.  I am curious how much of this pressure is caused by = pressure switch and relief valve settings and how much by thermal = influence.  With the plane on the ground it is normal to see low = side circuit will go up and down in pressure with changes in ambient = temperature.  The high side should remain at or near zero though.
Chris
 
 
Chris Zavatson
N91CZ
360 std


 
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