X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mx2.magma.ca ([206.191.0.250] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTPS id 932724 for flyrotary@lancaironline.net; Wed, 04 May 2005 16:36:06 -0400 Received-SPF: none receiver=logan.com; client-ip=206.191.0.250; envelope-from=ianddsl@magma.ca Received: from mail1.magma.ca (mail1.magma.ca [206.191.0.252]) by mx2.magma.ca (8.13.0/8.13.0) with ESMTP id j44KZKNr012912 for ; Wed, 4 May 2005 16:35:21 -0400 Received: from binky (ottawa-hs-64-26-156-111.s-ip.magma.ca [64.26.156.111]) by mail1.magma.ca (8.13.0/8.13.0) with SMTP id j44KZHni010130 for ; Wed, 4 May 2005 16:35:21 -0400 Reply-To: From: "Ian Dewhirst" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: Circuit breaker article Date: Wed, 4 May 2005 16:35:14 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0034_01C550C7.3FDFC230" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0034_01C550C7.3FDFC230 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Since this all started with Rusty's fuel pump problem I thought that this little quote form the big iron manufacturers would be of interest ;-) From Boeing: "Resetting circuit breakers is not generally a requirement in flight. However, a tripped circuit breaker (other than a fuel pump C/B) may be reset at the Captain's discretion, after a short cooling period (approximately 2 minutes). If it trips again no further attempt is to be made to reset that C/B." From the Airbus Flight Crew Operating Manual for the A300/310/319/320/321: "In flight, the flight crew must not reengage a tripped C/B. On the ground if the pilot coordinates the action with maintenance he may reengage a tripped C/B provided the cause of the tripped C/B is identified." My Source - http://www.aviationtoday.com/reports/alpa_faa.htm Perhaps the best feature a fuse brings to the table is some extra loot to pay for planned redundancy in critical systems, and the removal of the temptation to start and electrical fire in flight. -- Ian -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Bill Dube Sent: Wednesday, May 04, 2005 3:04 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Circuit breaker article Interesting article, Mark. I think it supports use of fuses, and redundancy in critical circuits. The word "fuse" appears nowhere in the article. >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0034_01C550C7.3FDFC230 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Since=20 this all started with Rusty's fuel pump problem I thought that this = little quote=20 form the big iron manufacturers would be of interest = ;-)

From Boeing:=20 "Resetting circuit breakers is not generally a requirement in = flight.=20 However, a tripped circuit breaker (other than a fuel pump C/B) = may be=20 reset at the Captain's discretion, after a short cooling period = (approximately 2 minutes). If it trips again no further attempt is to be = made to=20 reset that C/B."

From the Airbus Flight = Crew=20 Operating Manual for the A300/310/319/320/321: "In flight, the = flight=20 crew must not reengage a tripped C/B. On the ground if the pilot = coordinates the=20 action with maintenance he may reengage a tripped C/B provided the cause = of the=20 tripped C/B is identified."

My=20 Source - http://www.avi= ationtoday.com/reports/alpa_faa.htm

Perhaps the best feature a fuse brings to the table is some = extra loot to=20 pay for planned redundancy in critical systems, and the removal of = the=20 temptation to start and electrical fire in flight.

--=20 Ian

-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of Bill=20 Dube
Sent: Wednesday, May 04, 2005 3:04 PM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: Circuit breaker=20 article

Interesting article, Mark. I think it = supports use of=20 fuses, and redundancy in critical circuits.

&nb= sp; The=20 word "fuse" appears nowhere in the article.
>>  Homepage:  http://www.flyrotary.com/

>>  Archive:   http://lancaironline.net/lists/flyrotary/List.html

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