Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Mon, 31 Jan 2005 14:37:26 -0500 Message-ID: X-Original-Return-Path: Received: from smtpauth05.mail.atl.earthlink.net ([209.86.89.65] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 652239 for lml@lancaironline.net; Mon, 31 Jan 2005 10:46:39 -0500 Received-SPF: none receiver=logan.com; client-ip=209.86.89.65; envelope-from=leighton@teleport.com Received: from [165.121.33.40] (helo=user) by smtpauth05.mail.atl.earthlink.net with asmtp (Exim 4.34) id 1Cvdke-0003wW-Iy for lml@lancaironline.net; Mon, 31 Jan 2005 10:46:09 -0500 X-Original-Message-ID: <003001c507ab$fb591ad0$282179a5@user> From: "Leighton" X-Original-To: "Lancair Mail list" Subject: Rudder bellcrank problem X-Original-Date: Mon, 31 Jan 2005 07:46:06 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002D_01C50768.EBCDE660" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-ELNK-Trace: ea0fe3d44b30ba0fc355332e9c4b49d598c48853aa0a5d8969a642b488cf61079c5df228314c3ce0350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 165.121.33.40 This is a multi-part message in MIME format. ------=_NextPart_000_002D_01C50768.EBCDE660 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable The bellcrank problem is only with the Legacy units. The IV and ES = assemblies are a completely different design. The problem is that the = bushing should be pivoting on the AN4 bolt but instead the bushing = begins turning in the aluminum bellcrank arm and wallows out the hole in = the aluminum. If the bushing is a tight enough fit initially in the = bellcrank arm this may not happen but it's felt that at least on the = earlier parts the fit was too loose causing premature wear. We replaced = the bad ones with newer parts of the original design and the bushing fit = was so tight that it required using a vise to press them in, as it = should be. We also used a little grease on the pivot bolt and made sure = that the pivot bolt wasn't overtightened causing it to pinch the bushing = and put it in a bind. You can check the condition of an installed = bellcrank by shining a light into the tailcone while someone moves the = rudder back and forth. If the bellcrank rolls fore and aft rather than = just pivots around the center bolt it is beginning to wear. =20 Lancair said they have already made arrangements to get the word out to = builders/flyers but I don't know the details of that. As far as Lancair = "selling" the replacement parts, that's my assumption, not necessarily = their position. Leighton Mangels ------=_NextPart_000_002D_01C50768.EBCDE660 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
The bellcrank problem is only with the Legacy = units.  The=20 IV and ES assemblies are a completely different design.  The = problem is=20 that the bushing should be pivoting on the AN4 bolt but instead the = bushing=20 begins turning in the aluminum bellcrank arm and wallows out the hole in = the=20 aluminum.  If the bushing is a tight enough fit initially in the = bellcrank=20 arm this may not happen but it's felt that at least on the earlier parts = the fit=20 was too loose causing premature wear.  We replaced the bad ones = with newer=20 parts of the original design and the bushing fit was so tight that it = required=20 using a vise to press them in, as it should be.  We also used a = little=20 grease on the pivot bolt and made sure that the pivot bolt wasn't = overtightened=20 causing it to pinch the bushing and put it in a bind.  You can = check the=20 condition of an installed bellcrank by shining a light into the tailcone = while=20 someone moves the rudder back and forth.  If the bellcrank rolls = fore and=20 aft rather than just pivots around the center bolt it is beginning to=20 wear. 
 
Lancair said they have already made arrangements to = get the=20 word out to builders/flyers but I don't know the details of that.  = As far=20 as Lancair "selling" the replacement parts, that's my assumption, not=20 necessarily their position.
 
Leighton Mangels
 
 
------=_NextPart_000_002D_01C50768.EBCDE660--