X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 50 [XX] Return-Path: Sender: To: lml Date: Wed, 03 Jan 2007 10:11:29 -0500 Message-ID: X-Original-Return-Path: Received: from rwcrmhc11.comcast.net ([216.148.227.151] verified) by logan.com (CommuniGate Pro SMTP 5.1.4) with ESMTP id 1732152 for lml@lancaironline.net; Wed, 03 Jan 2007 02:02:59 -0500 Received-SPF: none receiver=logan.com; client-ip=216.148.227.151; envelope-from=harryleague@comcast.net Received: from harrystecras1 (c-71-57-0-16.hsd1.il.comcast.net[71.57.0.16]) by comcast.net (rwcrmhc11) with SMTP id <20070103070204m11003sp0de>; Wed, 3 Jan 2007 07:02:10 +0000 From: "Harry League" X-Original-To: "'Lancair Mailing List'" Subject: RE: [LML] Nose strut inspections - all models X-Original-Date: Wed, 3 Jan 2007 01:02:04 -0600 X-Original-Message-ID: <004a01c72f05$169601a0$6501a8c0@HarrysTecraS1> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_004B_01C72ED2.CBFB91A0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Accu+1WIoj8tM39+SDONayExCBUf4wACaxYw X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_004B_01C72ED2.CBFB91A0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Chris, Does this go for the new strut as well? Regards, Harry League _____ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Zavatson, Christopher J (US SSA) Sent: Tuesday, January 02, 2007 11:52 PM To: lml Subject: [LML] Nose strut inspections - all models While discussing maintenance issues with other Lancairians, I have found that many are not aware of a particular maintenance check on the nose strut which should be done at least annually. It involves a potential leak path for the strut oil to escape undetected. This of course can lead to such unpleasant things such as loss of shimmy damping followed by broken mounts and engine and prop rebuilds etc. The interior of the strut tube can slowly fill with strut oil if one of two very small O-rings starts to leak. The O-rings are located in what is called the guide key retainer. You can see the guide key retainer if you look up inside the nose strut with the fork removed. There are a few versions out there. Some are steel and rectangular, while older versions are triangular and are made of aluminum. There are two 5-40 screws that penetrate through the wall of the strut tube and are screwed into the guide key retainer. Counter bores in the guide key retainer capture two tiny O-rings that hold back strut oil. Because these screws are in the shimmy damper area, they are submerged in oil. Therefore, if there is a leak, the strut will not loose noticeable pressure, just oil. The interior of the strut tube should be checked for oil leakage. If the leak is bad, accumulated oil will run out as soon as the fork is loosened. If the leak is light the inner walls of the tube will be damp with oil. Replacing the O-rings requires a complete tear down. Unfortunately the guide key and guide key retainer are at the very core of the strut. This is one of those items that should not be overlooked as it could cost you (or your insurance company) a bundle. Chris Zavatson N91CZ 360std www.N91CZ.com ------=_NextPart_000_004B_01C72ED2.CBFB91A0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Chris,

 

Does this go for the new strut as = well?

 

Regards,

Harry = League

 <= /span>

 

From: = Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Zavatson, Christopher J (US SSA)
Sent: Tuesday, January = 02, 2007 11:52 PM
To: lml
Subject: [LML] Nose strut inspections - all models

 

 

 

While discussing maintenance issues with other = Lancairians, I have found that many are not aware of a particular maintenance check = on the nose strut which should be done at least annually.  It involves a potential leak path for the strut oil to escape undetected.  This = of course can lead to such unpleasant things such as loss of shimmy damping followed by broken mounts and engine and prop rebuilds = etc.

The interior of the strut tube can slowly fill with = strut oil if one of two very small O-rings starts to leak.  The O-rings = are located in what is called the guide key retainer.  You can see the = guide key retainer if you look up inside the nose strut with the fork = removed.  There are a few versions out there.  Some are steel and = rectangular, while older versions are triangular and are made of aluminum.  There are = two 5-40 screws that penetrate through the wall of the strut tube and are = screwed into the guide key retainer.  Counter bores in the guide key = retainer capture two tiny O-rings that hold back strut oil.  Because these = screws are in the shimmy damper area, they are submerged in oil.  = Therefore, if there is a leak, the strut will not loose noticeable pressure, just = oil.  The interior of the strut tube should be checked for oil leakage.  = If the leak is bad, accumulated oil will run out as soon as the fork is loosened.  If the leak is light the inner walls of the tube will be = damp with oil.  Replacing the O-rings requires a complete tear = down.  Unfortunately the guide key and guide key retainer are at the very core = of the strut. 

This is one of those items that should not be = overlooked as it could cost you (or your insurance company) a = bundle.

 

 

Chris Zavatson

N91CZ

360std

www.N91CZ.com

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