X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 07 Sep 2008 18:09:01 -0400 Message-ID: X-Original-Return-Path: Received: from fmailhost06.isp.att.net ([204.127.217.106] verified) by logan.com (CommuniGate Pro SMTP 5.2.7) with ESMTP id 3116982 for lml@lancaironline.net; Sat, 06 Sep 2008 08:17:33 -0400 Received-SPF: pass receiver=logan.com; client-ip=204.127.217.106; envelope-from=lancair1@bellsouth.net Received: from doughppc (adsl-074-180-034-067.sip.jax.bellsouth.net[74.180.34.67]) by isp.att.net (frfwmhc06) with SMTP id <20080906121655H06009stibe>; Sat, 6 Sep 2008 12:16:55 +0000 X-Originating-IP: [74.180.34.67] From: "Douglas W Johnson" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] Re: Mag Myth X-Original-Date: Sat, 6 Sep 2008 08:16:37 -0400 X-Original-Message-ID: <008c01c9101a$69b7d820$3d278860$@net> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_008D_01C90FF8.E2A63820" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AckNce52Pugunu71Rl2C0k5yCMxudACp4bNQ Content-Language: en-us This is a multipart message in MIME format. ------=_NextPart_000_008D_01C90FF8.E2A63820 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit I have had similar problems with both the Bendix mags and the Unison mags, but less so with the Unison. Use only Unison now, as it seems to be the more reliable of the two. Pressurizing mags is an inexact science (note there is usually only one bleed air from the bottom of one of the mags-I think the right-and most of the corrosion I have seen is on that mag, with both systems). I talked to Unison a while back-between the thin air and arcing risk and the constant/frequent transitions we put these mags through between high dry and low moist air, our flight regime is particularly hard on these components (much more so than on low fliers). And no, you don't need to remove any of the plumbing to change out or inspect the mags. Doug Douglas W. Johnson, MD PA 8265 Riding Club Road Jacksonville, FL 32256 (904) 642-6016 phone (904) 202-7020 fax Lancair1@bellsouth.net www.frogdocs.com * Is this a common problem, have others experienced issues or failures with the 6310 mags? * Does anyone (including Unison) have a clue as to what might be causing these pre-mature failures? * The service bulletin states that when you change a mag or update it, you then pull it again and again to re-inspect it. That looks like a LOT of work. With the upper deck induction and fuel injection on this engine, does ALL that have to be removed to pull a mag or can you somehow slide it out with at least some of that in place? * Any further information or experiences would be greatly appreciated. Thanks again John and Tom!! Regards, Erik Larson N74FX ------=_NextPart_000_008D_01C90FF8.E2A63820 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I have had similar = problems with both the Bendix mags and the Unison mags, but less so with the = Unison. Use only Unison now, as it seems to be the more reliable of the two. = Pressurizing mags is an inexact science (note there is usually = only one bleed air from the bottom of one of the mags—I think the right—and most of the corrosion I have seen is on that mag, with both systems). I talked to Unison a while back—between the = thin air and arcing risk and the constant/frequent transitions we put these mags through between high dry and low moist air, our flight regime is = particularly hard on these components (much more so than on low = fliers).

And no, you = don’t need to remove any of the plumbing to change out or inspect the mags.

Doug

Douglas W. Johnson, MD = PA

8265 Riding Club = Road

Jacksonville, FL = 32256

(904) 642-6016 = phone

(904) 202-7020 fax

Lancair1@bellsouth.net<= /p>

www.frogdocs.com

* Is this a = common problem, have others experienced issues or failures with the 6310 = mags?

* Does = anyone (including Unison) have a clue as to what might be causing these pre-mature failures?

* The = service bulletin states that when you change a mag or update it, you then pull = it again and again to re-inspect it. That looks like a LOT of work. = With the upper deck induction and fuel injection on this engine, does ALL that = have to be removed to pull a mag or can you somehow slide it out with at least = some of that in place?

* Any = further information or experiences would be greatly = appreciated.

Thanks again John and Tom!!

Regards,

Erik = Larson

N74FX

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