X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 07 Apr 2011 14:53:11 -0400 Message-ID: X-Original-Return-Path: Received: from asmtpout026.mac.com ([17.148.16.101] verified) by logan.com (CommuniGate Pro SMTP 5.4c2) with ESMTP id 4934893 for lml@lancaironline.net; Wed, 06 Apr 2011 18:19:19 -0400 Received-SPF: pass receiver=logan.com; client-ip=17.148.16.101; envelope-from=k.gregory@me.com MIME-version: 1.0 Content-type: multipart/alternative; boundary="Boundary_(ID_i/pv8q9avzgQ1RRaml7uAQ)" Received: from Tablet (173-163-230-75-savannah.hfc.comcastbusiness.net [173.163.230.75]) by asmtp026.mac.com (Oracle Communications Messaging Exchange Server 7u4-20.01 64bit (built Nov 21 2010)) with ESMTPSA id <0LJ9006HN4MDH440@asmtp026.mac.com> for lml@lancaironline.net; Wed, 06 Apr 2011 15:18:14 -0700 (PDT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.2.15,1.0.148,0.0.0000 definitions=2011-04-06_06:2011-04-06,2011-04-06,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 suspectscore=1 phishscore=0 bulkscore=92 adultscore=0 classifier=spam adjust=0 reason=mlx engine=6.0.2-1012030000 definitions=main-1104060154 From: "K. Gregory" X-Original-To: lml@lancaironline.net Subject: Request Electrical System Help X-Original-Date: Wed, 06 Apr 2011 15:17:35 -0700 X-Original-Message-id: <004f01cbf4a8$6f6a6d80$4e3f4880$%gregory@me.com> X-Mailer: Microsoft Office Outlook 12.0 Thread-index: Acv0qGyO/KP/oQfvQBG0VgjRF5VdZg== Content-language: en-us x-cr-hashedpuzzle: eiE= AthA AuGv CIAe C9mf E9IV FINM FxPv HKEW IUiB IfvQ JM4V JTW8 JpQb K7Uu LXkZ;1;bABtAGwAQABsAGEAbgBjAGEAaQByAG8AbgBsAGkAbgBlAC4AbgBlAHQA;Sosha1_v1;7;{66310016-9530-4BC4-9131-85E6FA5D5C47};awAuAGcAcgBlAGcAbwByAHkAQABtAGUALgBjAG8AbQA=;Wed, 06 Apr 2011 22:17:32 GMT;UgBlAHEAdQBlAHMAdAAgAEUAbABlAGMAdAByAGkAYwBhAGwAIABTAHkAcwB0AGUAbQAgAEgAZQBsAHAA x-cr-puzzleid: {66310016-9530-4BC4-9131-85E6FA5D5C47} This is a multi-part message in MIME format. --Boundary_(ID_i/pv8q9avzgQ1RRaml7uAQ) Content-type: text/plain; CHARSET=US-ASCII Content-transfer-encoding: 7BIT I recently upgraded my 2nd-owner LNC2-235 with dual Dynon Skyview EFIS. When completed, I discovered that each time the gear motor runs, the output of the networked sensors (GPS, EMS, and ADAHRS) gets interrupted, resulting in red X's displayed on screen. When the gear cycle is complete, the EFIS returns to normal. Testing with the EFIS system power isolated from the aircraft's electrical system by operating only on their independent backup batteries resulted in the exact symptom. From that I concluded that RF from the pump motor must be interfering with the sensor signals. I then rerouted all sensor leads as far from the pump as possible, but still had only incremental improvement. Now I'm thinking about ways of shielding the pump and it's wiring in an effort to reduce their RF output. What I would like to know is if anyone knows how to best accomplish this, and, if after reading this, anyone sees an alternate possibility of what could be causing the problem. Thanks in advance for any feedback you might have for me. Kevin Gregory LNC2 - 235 / KHND --Boundary_(ID_i/pv8q9avzgQ1RRaml7uAQ) Content-type: text/html; CHARSET=US-ASCII Content-transfer-encoding: 7BIT

I recently upgraded my 2nd-owner LNC2-235 with dual Dynon Skyview EFIS. When completed, I discovered that each time the gear motor runs, the output of the networked sensors (GPS, EMS, and ADAHRS) gets interrupted, resulting in red X’s displayed on screen. When the gear cycle is complete, the EFIS returns to normal. Testing with the EFIS system power isolated from the aircraft’s electrical system by operating only on their independent backup batteries resulted in the exact symptom.

From that I concluded that RF from the pump motor must be interfering with the sensor signals. I then rerouted all sensor leads as far from the pump as possible, but still had only incremental improvement.

Now I’m thinking about ways of shielding the pump and it’s wiring in an effort to reduce their RF output. What I would like to know is if anyone knows how to best accomplish this, and, if after reading this, anyone sees an alternate possibility of what could be causing the problem.

Thanks in advance for any feedback you might have for me.

Kevin Gregory

LNC2 – 235 / KHND

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