X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 13 Jul 2006 02:16:51 -0400 Message-ID: X-Original-Return-Path: Received: from bay0-omc1-s24.bay0.hotmail.com ([65.54.246.96] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1234819 for lml@lancaironline.net; Thu, 13 Jul 2006 00:23:13 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.54.246.96; envelope-from=cgainza@msn.com Received: from hotmail.com ([65.54.174.75]) by bay0-omc1-s24.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.1830); Wed, 12 Jul 2006 21:22:26 -0700 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 12 Jul 2006 21:22:26 -0700 X-Original-Message-ID: Received: from 67.180.23.28 by BAY103-DAV3.phx.gbl with DAV; Thu, 13 Jul 2006 04:22:23 +0000 X-Originating-IP: [67.180.23.28] X-Originating-Email: [cgainza@msn.com] X-Sender: cgainza@msn.com From: "Craig Gainza" X-Original-To: "list lancair" Subject: Leading edge pitting X-Original-Date: Wed, 12 Jul 2006 21:22:25 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0098_01C6A5F9.456D5270" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.20.0029.3000 Seal-Send-Time: Wed, 12 Jul 2006 21:22:25 -0700 X-OriginalArrivalTime: 13 Jul 2006 04:22:26.0622 (UTC) FILETIME=[F25AD5E0:01C6A633] X-Original-Return-Path: cgainza@msn.com This is a multi-part message in MIME format. ------=_NextPart_000_0098_01C6A5F9.456D5270 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Recently out of fresh paint, my wife and I flew our IV-P to Sedona, AZ. = Some IMC leaving California but otherwise a a VFR uneventful flight. = Upon landing in Sedona, I noticed deep pitting (to the depth of carbon) = every 10-12" on the leading edge of both wings. Running my hand near = each pit released a significant static discharge. No damage was noted = to the fuselage. No rocks or debris were noted at the departure or = arrival airport. Wings were bonded to the fuselage by a braided grounding strap attached = to the top skin near the speed brake opening and terminated at the gear = box near the rear spar attachment. The run was approximately 4-5 feet. = The ailerons and elevators also were grounded to the wing using braided = grounding straps. Multimeter testing revealed that there was = connectivity between all wing components and the fuselage. Unfortunately, I did not install static wicks from Napa to Sedona. I = installed the wicks in Sedona and have not noticed any additional = pitting since installing them. =20 My question to the listers: =20 1) Have any of you experienced similar pitting problems? 2) Is the 4-5 foot grounding strap too long? =20 3) Should the bottom skin be grounded as well? 4) Have I adequately dealt with this issue by installing the wicks? I am heading back to the paint shop on Friday and want to make sure I = have resolved this issue. Any comments are greatly appreciated! See you at Oshkosh! Craig Gainza IVP TSIOF 550 Napa, CA ------=_NextPart_000_0098_01C6A5F9.456D5270 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Recently out of fresh paint, my wife and I flew our IV-P to Sedona, = AZ. Some IMC leaving California but otherwise a a VFR=20 uneventful flight. Upon landing in Sedona, I noticed deep = pitting (to=20 the depth of carbon) every 10-12" on the leading edge of both = wings. =20 Running my hand near each pit released a significant static = discharge. No=20 damage was noted to the fuselage. No rocks or debris were noted at = the=20 departure or arrival airport.

Wings were bonded to the fuselage by a braided grounding strap = attached to the top skin near the speed brake opening and terminated at = the gear=20 box near the rear spar attachment. The run was approximately 4-5=20 feet. The ailerons and elevators also were grounded to the wing = using=20 braided grounding straps. Multimeter testing revealed that there = was=20 connectivity between all wing components and the fuselage.

Unfortunately, I did not install static wicks from Napa = to=20 Sedona. I installed the wicks in Sedona and have not noticed = any=20 additional pitting since installing them.

My question to the listers:

1) Have any of you experienced = similar=20 pitting problems?

2) Is the 4-5 foot grounding strap = too=20 long?

3) Should the bottom skin be grounded = as=20 well?

4) Have I adequately dealt with this = issue by=20 installing the wicks?

I am heading back to the paint shop on Friday and want to make sure = I have=20 resolved this issue. Any comments are greatly appreciated!

See you at Oshkosh!

Craig Gainza

IVP TSIOF 550

Napa, CA

------=_NextPart_000_0098_01C6A5F9.456D5270--