X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 12 May 2005 11:18:41 -0400 Message-ID: X-Original-Return-Path: Received: from imo-d05.mx.aol.com ([205.188.157.37] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 941200 for lml@lancaironline.net; Thu, 12 May 2005 10:42:07 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.157.37; envelope-from=REHBINC@aol.com Received: from REHBINC@aol.com by imo-d05.mx.aol.com (mail_out_v38_r1.7.) id q.1f7.9a12e18 (2519) for ; Thu, 12 May 2005 10:41:17 -0400 (EDT) From: REHBINC@aol.com X-Original-Message-ID: <1f7.9a12e18.2fb4c50d@aol.com> X-Original-Date: Thu, 12 May 2005 10:41:17 EDT Subject: Re: [LML] Lancair N360ZR Down in North Carolina X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1115908876" X-Mailer: 9.0 for Windows sub 5116 -------------------------------1115908876 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Rick, Looks to me like the engine ingested something that didn't agree with it. Probably aluminum from the lack of brinelling on the valves (the speckels on the valves are just surface smears and cleaning aren't they? Tough to be sure from the photos). It has a very similar appearance to an episode of light detonation I had that liberated a section of the head land from the piston. The piston frag rattle around until it closed the plug gap and then either disintigrated or managed to get out throught the exhaust valve. I felt an initial engine shake and then just a miss with a loss of power. Rob -------------------------------1115908876 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Rick,

Looks to me like the engine ingested something that didn't agree with i= t. Probably aluminum from the lack of brinelling on the valves (the speckels= on the valves are just surface smears and cleaning aren't they? Tough to be= sure from the photos).

It has a very similar appearance to an episode of light detonation I ha= d that liberated a section of the head land from the piston. The piston frag= rattle around until it closed the plug gap and then either disintigrated or= managed to get out throught the exhaust valve. I felt an initial engine sha= ke and then just a miss with a loss of power.

Rob

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