X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 15 Jul 2008 07:51:07 -0400 Message-ID: X-Original-Return-Path: Received: from [66.224.224.250] (HELO agcpdx.AGCEngineering.com) by logan.com (CommuniGate Pro SMTP 5.2.5) with ESMTP id 3025108 for lml@lancaironline.net; Mon, 14 Jul 2008 10:27:33 -0400 Received-SPF: none receiver=logan.com; client-ip=66.224.224.250; envelope-from=JohnB@agcheattransfer.com Subject: 4P Door seal pump operation at altitude X-Original-Date: Mon, 14 Jul 2008 07:26:54 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C8E5BD.AA676D86" Content-Transfer-Encoding: 7bit X-Original-Message-ID: Content-Class: urn:content-classes:message X-MS-Has-Attach: Priority: normal Importance: normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1914 X-MS-TNEF-Correlator: Thread-Topic: 4P Door seal pump operation at altitude thread-index: AcjlvaowJm2nKX4/Th65t4UlEyn3qw== From: "John C. Bohn" X-Original-To: "Lancair Mailing List" This is a multi-part message in MIME format. ------_=_NextPart_001_01C8E5BD.AA676D86 X-EC0D2A8E-5CB7-4969-9C36-46D859D137BE-PartID: 7CF55121-2773-46B2-9747-BE34D5988FEA Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable My door seal pump works fine on the ground i.e. it turns on and shuts off at the proper pressure settings. At altitude on a long trip over 3 or 4 hours the door seal light comes on but the pump doesn't run. I thought I fixed the problem as I found the connectors in the overhead somewhat loose so I secured them but now I'm finding some arcing on the center (assuming power) post and if I use a small screw driver and try to complete the connection the pump barely wants to start (hard to complete circuit) it just arcs. I'm getting good alignment between the door and airframe posts and what I assume to be good spring pressure so I'm speculating the temperature of the wires/posts (at altitude is very cold) isn't providing good conductivity to complete the circuit. Has anyone else seen this or can assist in troubleshooting? =20 John C. Bohn Lancair 4P N28487 Direct (Cell)- 503-887-2933 ------_=_NextPart_001_01C8E5BD.AA676D86 X-EC0D2A8E-5CB7-4969-9C36-46D859D137BE-PartID: BA1517B2-B524-4340-B1AF-AF5469042749 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

My door seal pump works fine on the ground i.e. it = turns on and shuts off at the proper pressure settings.  At altitude on a = long trip over 3 or 4 hours the door seal light comes on but the pump = doesn’t run.  I thought I fixed the problem as I found the connectors in the overhead somewhat loose so I secured them but now I’m finding some arcing = on the center (assuming power) post and if I use a small screw driver and try = to complete the connection the pump barely wants to start (hard to complete circuit) it just arcs.  I’m getting good alignment between = the door and airframe posts and what I assume to be good spring pressure so = I’m speculating the temperature of the wires/posts (at altitude is very = cold) isn’t providing good conductivity to complete the circuit.  Has anyone = else seen this or can assist in troubleshooting?

 

John C. Bohn

Lancair 4P = N28487

= Direct (Cell)- 503-887-2933

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