X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 02 May 2011 15:11:42 -0400 Message-ID: X-Original-Return-Path: Received: from nm21-vm1.bullet.mail.bf1.yahoo.com ([98.139.213.143] verified) by logan.com (CommuniGate Pro SMTP 5.4c3j) with SMTP id 4964343 for lml@lancaironline.net; Mon, 02 May 2011 13:52:38 -0400 Received-SPF: none receiver=logan.com; client-ip=98.139.213.143; envelope-from=tmoradia@yahoo.com Received: from [98.139.212.152] by nm21.bullet.mail.bf1.yahoo.com with NNFMP; 02 May 2011 17:52:02 -0000 Received: from [98.139.212.210] by tm9.bullet.mail.bf1.yahoo.com with NNFMP; 02 May 2011 17:52:02 -0000 Received: from [127.0.0.1] by omp1019.mail.bf1.yahoo.com with NNFMP; 02 May 2011 17:52:01 -0000 X-Yahoo-Newman-Property: ymail-5 X-Yahoo-Newman-Id: 991263.40590.bm@omp1019.mail.bf1.yahoo.com Received: (qmail 58447 invoked by uid 60001); 2 May 2011 17:52:01 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=F/mvmEkon4Y1/JrzgB713oYpCUpILIp3Z13PEYi2nsVLhOoWWG9oOLtjC1B0k760Vpq2hAhokcxePhGq0dASENtqVjUkgqn0vARvp/Bj0j+xnPcfW/y5ZiU1Hh/L+qh7W+vo+dammx26hus4QmLUO/YA0y1oRsMlUBi6wpC3UiM=; X-Original-Message-ID: <896447.49854.qm@web161209.mail.bf1.yahoo.com> X-YMail-OSG: T9U8SMwVM1nLt4PLXkZUC79xrbTI7UaDekMdTO7cE50024o Z8o_BdFnIO7iYW_MsuWz4h.Ixguf9zG1hzSoF4pXTp7__Uv5xbWjfo4djqcs 6S_4ezvVRCDAxdaFZGrt_TcHLTHW_sDQ3nHV_jtSvh_XJqlozfAda5lgU2I7 W1HfCmGSo15hGivHgzPEV.dYWWHghgeVAuf1uieJNyMrS9jVUvlzV096mZMT 12tqRCDrPF2MaqzCpIJO6RzyTPxZpAXRHY0zjW06d1UBplHUMBAUmQEY.EUD rgBYQ7hHhr_poNncofCrWDyMEbOI8_rf6oiQRkRuylizaHufpH35NdqyYgbN 05mF2xyFZskOfa3CnVx5nLK.sLb5RKGfFZsWuXueNqYy2xVDVAXGwNw-- Received: from [174.127.45.58] by web161209.mail.bf1.yahoo.com via HTTP; Mon, 02 May 2011 10:52:01 PDT X-Mailer: YahooMailRC/559 YahooMailWebService/0.8.110.299900 References: X-Original-Date: Mon, 2 May 2011 10:52:01 -0700 (PDT) From: Tony Moradian Subject: Re: [LML] Re: GRT Horizon HX Ahars issues X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-2000414394-1304358721=:49854" --0-2000414394-1304358721=:49854 Content-Type: text/plain; charset=us-ascii Thank you for your input. I will try that. I'll start by turning off the second alternator that was added after paint. Tony Moradian Legacy L2K330 N444HL ________________________________ From: Colyn Case To: lml@lancaironline.net Sent: Sun, May 1, 2011 5:54:16 PM Subject: [LML] Re: GRT Horizon HX Ahars issues Tony, how about leaving the alternators off but the engine on? If that works that might point to something about the new alternator or related wiring. Colyn On May 1, 2011, at 1:00 PM, swaid rahn wrote: Hi Tony, > I had 2 similar problems but it was with Chelton, and is probably unrelated but >it may help. The 1st was I would loose the PFD after about 15 min. and we >thought it was the ADHARS. It turned out we had sent the cheltons back for some >work and they upgraded the software. Our Chelton displays were named #0 and #1 >in the airplane when they were installed. The software upgrade would only work >if they were named #1 and #2, once we named them correctly in the airplane they >worked fine. This happened during the buy out of Chelton and personnel changes, >it was unreal the amount of pain and suffering (and expense) we went through on >that one. > The 2nd problem was we would have the oil temp increase beyond max limits and I >did not think we had an oil temp. problem. Turns out I added a 2nd ground wire >from the grounding buss to the other battery and this fixed the engine over temp >problem. The ground path was going through the oil temp sending unit (Walter >Engine) and was not large enough to carry the ground ele. loads. > What I am getting at is you are looking in the right direction with loose >grounds but you may not have a large enough ground conductor for your ele. >system with the addition of a 2nd alternator. You may want to revisit the ele. >ground schematic to see if you need to improve your grounding system. I don't >know if this is your problem but I have seen problems with composite aircraft >with ground issues. I know this glass cockpit stuff is very sensitive to voltage >spikes and ground issues. >Good luck, I hope this helps, >Swaid Rahn >LNC4P(Walter) >LNC4P(Garrett) in work > > >On Sat, Apr 30, 2011 at 6:47 PM, Tony Moradian wrote: > >Hello All, >> >>I have the GRT Horizon HX dual Ahars in my Legacy. For the first 30 hours i had >>absolutely no problems with these units. After that first 30 hours i took it in >>for paint and interior and added the second alternator as well as the canopy >>seal system. Since then i continually lose ahars #1 within the first five >>minutes of engine start, and lose ahars#2 within the first hour. We have done a >>lot of trouble shooting to look for loose ground and/or power. The other >>interesting thing to note is that if turn on the system on the ground without >>the engine running, I never lose the ahars. I do have a Vertical Power Vp-200. >>I see no voltage or current alarms in the VP-200. >> >>GRT folks seem to think that there might be an interference with the ahars if >>COAX is close by. Has anybody experienced anything like this? >> >> >> Tony Moradian >>Legacy L2K330 >>N444HL >> >> > > >-- >Swaid L. Rahn >Indigo Aviation, Inc. >940 Mock Road >Springfield, Ga. 31329 >Cell 912.655.0966 > > > --0-2000414394-1304358721=:49854 Content-Type: text/html; charset=us-ascii
Thank you for your input.  I will try that.  I'll start by turning off the second alternator that was added after paint. 
 
Tony Moradian
Legacy L2K330
N444HL


From: Colyn Case <colyncase@earthlink.net>
To: lml@lancaironline.net
Sent: Sun, May 1, 2011 5:54:16 PM
Subject: [LML] Re: GRT Horizon HX Ahars issues

Tony,   how about leaving the alternators off but the engine on?   If that works that might point to something about the new alternator or related wiring.

Colyn

On May 1, 2011, at 1:00 PM, swaid rahn wrote:

Hi Tony,
 I had 2 similar problems but it was with Chelton, and is probably unrelated but it may help. The 1st was I would loose the PFD after about 15 min. and we thought it was the ADHARS. It turned out we had sent the cheltons back for some work and they upgraded the software. Our Chelton displays were named #0 and #1 in the airplane when they were installed. The software upgrade would only work if they were named #1 and #2, once we named them correctly in the airplane they worked fine. This happened during the buy out of Chelton and personnel changes, it was unreal the amount of pain and suffering (and expense) we went through on that one.
 The 2nd problem was we would have the oil temp increase beyond max limits and I did not think we had an oil temp. problem. Turns out I added a 2nd ground wire from the grounding buss to the other battery and this fixed the engine over temp problem. The ground path was going through the oil temp sending unit (Walter Engine) and was not large enough to carry the ground ele. loads.
 What I am getting at is you are looking in the right direction with loose grounds but you may not have a large enough ground conductor for your ele. system with the addition of a 2nd alternator. You may want to revisit the ele. ground schematic to see if you need to improve your grounding system. I don't know if this is your problem but I have seen problems with composite aircraft with ground issues. I know this glass cockpit stuff is very sensitive to voltage spikes and ground issues.
Good luck, I hope this helps,
Swaid Rahn
LNC4P(Walter)
LNC4P(Garrett) in work

On Sat, Apr 30, 2011 at 6:47 PM, Tony Moradian <tmoradia@yahoo.com> wrote:
Hello All,

I have the GRT Horizon HX dual Ahars in my Legacy.  For the first 30 hours i had absolutely no problems with these units.  After that first 30 hours i took it in for paint and interior and added the second alternator as well as the canopy seal system.  Since then i continually lose ahars #1 within the first five minutes of engine start, and lose ahars#2 within the first hour.  We have done a lot of trouble shooting to look for loose ground and/or power.  The other interesting thing to note is that if turn on the system on the ground without the engine running, I never lose the ahars.  I do have a Vertical Power Vp-200.  I see no voltage or current alarms in the VP-200.

GRT folks seem to think that there might be an interference with the ahars if COAX is close by.  Has anybody experienced anything like this?

 
Tony Moradian
Legacy L2K330
N444HL




--
Swaid L. Rahn
Indigo Aviation, Inc.
940 Mock Road
Springfield, Ga. 31329
Cell 912.655.0966



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