X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 27 Oct 2011 11:08:04 -0400 Message-ID: X-Original-Return-Path: Received: from mail-gy0-f180.google.com ([209.85.160.180] verified) by logan.com (CommuniGate Pro SMTP 5.4.2) with ESMTPS id 5174675 for lml@lancaironline.net; Thu, 27 Oct 2011 10:59:50 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.160.180; envelope-from=mwsletten@gmail.com Received: by gyf1 with SMTP id 1so5316288gyf.25 for ; Thu, 27 Oct 2011 07:59:13 -0700 (PDT) Received: by 10.236.72.167 with SMTP id t27mr52021730yhd.127.1319727553891; Thu, 27 Oct 2011 07:59:13 -0700 (PDT) X-Original-Return-Path: Received: from MarkDesktop (hld-main-204-13-115-88.hld.hometel.com. [204.13.115.88]) by mx.google.com with ESMTPS id w69sm7866959yhl.15.2011.10.27.07.59.10 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 27 Oct 2011 07:59:11 -0700 (PDT) From: "Mark Sletten" X-Original-To: X-Original-Cc: "'Taylor, David'" References: In-Reply-To: Subject: RE: [LML] Problem with Fluctuating Amperage X-Original-Date: Thu, 27 Oct 2011 09:59:23 -0500 X-Original-Message-ID: <008501cc94b9$04aeb1c0$0e0c1540$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0086_01CC948F.1BD8A9C0" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AcyTDEHQuudgrxBFR+yaJKzo0Sf4xQBqL+kQ Content-Language: en-us This is a multi-part message in MIME format. ------=_NextPart_000_0086_01CC948F.1BD8A9C0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit David, You should be able to isolate the problem to your charging system (alternator and voltage regulator) by turning off the alternator when the symptoms occur and noting whether they continue. If the symptoms continue after you turn off the alternator then it is not a problem with your charging system. If you can narrow the search to your charging system, I would start with simple (cheap) solutions before replacing the alternator or regulator. My first suspect would be the alternator master switch. If the internal contacts on the switch are worn enough they can change the internal resistance thereby affecting the voltage going to the regulator. -- Mark From: Taylor, David [mailto:dtaylor@crescentpark.com] Sent: Tuesday, October 25, 2011 6:50 AM To: lml@lancaironline.net Subject: [LML] Problem with Fluctuating Amperage Any ideas about what would cause my amperage to start fluctuating wildly about 5 minutes into a flight? It starts out fine after takeoff at 15 amps and then goes to -50 amps for 30 seconds, and then gyrates between 5 amps and -50 amps for a minute and then goes back to normal. It repeats this sequence every 5 minutes. My fuel gages also go down to zero during this episode and then back to normal. Is my B&C LR3C Linear Regulator going bad? (I'm getting these readings from my Grand Rapids EIS engine monitor. It's hooked up to a Grand Rapids EFIS Sport.) Thanks for the help! David T. Legacy RG ------=_NextPart_000_0086_01CC948F.1BD8A9C0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

David,

=

=

You should be able to = isolate the problem to your charging system (alternator and voltage = regulator) by turning off the alternator when the symptoms occur and = noting whether they continue. If the symptoms continue after you turn = off the alternator then it is not a problem with your charging = system.

=

If you can narrow the = search to your charging system, I would start with simple (cheap) = solutions before replacing the alternator or regulator. My first suspect = would be the alternator master switch. If the internal contacts on the = switch are worn enough they can change the internal resistance thereby = affecting the voltage going to the regulator.

=

-- = Mark

=

=

From:= = Taylor, David [mailto:dtaylor@crescentpark.com]
Sent: = Tuesday, October 25, 2011 6:50 AM
To: = lml@lancaironline.net
Subject: [LML] Problem with Fluctuating = Amperage

Any ideas = about what would cause my amperage to start fluctuating wildly about 5 = minutes into a flight?

It starts out fine after takeoff at 15 = amps and then goes to -50 amps for 30 seconds, and then gyrates between = 5 amps and -50 amps for a minute and then goes back to normal. It = repeats this sequence every 5 minutes.

My fuel gages also go = down to zero during this episode and then back to normal.

Is my = B&C LR3C Linear Regulator going bad?

(I'm getting these = readings from my Grand Rapids EIS engine monitor. It's hooked up to a = Grand Rapids EFIS Sport.)

Thanks for the help!

David = T.
Legacy RG

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