X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from m15.nyc.untd.com ([64.136.22.78] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with SMTP id 932999 for flyrotary@lancaironline.net; Wed, 04 May 2005 21:23:48 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.136.22.78; envelope-from=jbker@juno.com Received: from m15.nyc.untd.com (localhost [127.0.0.1]) by m15.nyc.untd.com with SMTP id AABBHU7MNAT35732 for (sender ); Wed, 4 May 2005 18:22:52 -0700 (PDT) X-UNTD-OriginStamp: Y+Mfppm2QyGfnY/dq+iW1UK75a/z4NXrpYSYKdHYmdh8o5W++WWBRg== Received: (from jbker@juno.com) by m15.nyc.untd.com (jqueuemail) id KR7V8A22; Wed, 04 May 2005 18:22:37 PDT To: flyrotary@lancaironline.net Date: Wed, 4 May 2005 21:21:24 -0400 Subject: Re: [FlyRotary] Re: Circuit breaker article( redundancy power) Message-ID: <20050504.212124.2832.9.JBKER@juno.com> X-Mailer: Juno 5.0.33 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary=--__JNP_000_7d4a.7239.1758 X-Juno-Line-Breaks: 8-6,7-10,13,16-21,26-27,29-32767 From: WALTER B KERR X-ContentStamp: 7:3:202187505 This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ----__JNP_000_7d4a.7239.1758 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Jim S wrote: <... You do not have to have more than one level of redundancy to basically eliminate any chance of total failure of the system with failures in the 1000 hour range ...> You might want to talk to the crew of that 757 or L1011 or whatever it was that crashed in Souix City(?) a few years back because it lost ONE of THREE engines and immediately went ballistic. The devil made me say that :o) ... Jim S. -------------------------------------------------- As a matter of fact , I have talked to Captain who servived this ordeal with great cockpit resource management. It was a terrible design that triggered this whole episode because all hydraulic lines were bundled. Reduncancy was not a factor here. Be the way, it was a GE fan failure that was not contained! I think the devil made me say that also:>) Bernie Kerr, 33 years as a gas turbine design and systems engineer at Pratt ----__JNP_000_7d4a.7239.1758 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: quoted-printable

Jim S wrote:

<... You do not have to have more than one = level of=20 redundancy to basically eliminate any chance of total failure of the system= with=20 failures in the 1000 hour range ...>
You might want to talk to the = crew of=20 that 757 or L1011 or whatever it was that crashed in Souix City(?) a few = years=20 back because it lost ONE of THREE engines and immediately went=20 ballistic.

The devil made me say that :o) ... Jim S.

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As a matter of fact , I have talked to Captain = who=20 servived this ordeal with great cockpit resource management. It was a = terrible=20 design that triggered this whole episode because all hydraulic lines were=20 bundled. Reduncancy was not a factor here. Be the way, it was a GE fan = failure=20 that was not contained! I think the devil made me say that=20 also:>)

Bernie Kerr, 33 years as a gas turbine design = and=20 systems engineer at Pratt

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