X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 09 Dec 2010 07:56:44 -0500 Message-ID: X-Original-Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.123] verified) by logan.com (CommuniGate Pro SMTP 5.3.11) with ESMTP id 4633638 for lml@lancaironline.net; Wed, 08 Dec 2010 08:37:00 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.123; envelope-from=super_chipmunk@roadrunner.com X-Original-Return-Path: X-Authority-Analysis: v=1.1 cv=uESSSoDEku2quKX/oFXS2Smn5+55LTFcWFr5T5T8nFs= c=1 sm=0 a=35Tvjzvas7lBNn8+H1IYgA==:17 a=Ia-xEzejAAAA:8 a=TeOYGAQb0RIcOSn9FRsA:9 a=v0Ff-VDtnodCeM1YdVwA:7 a=40dWU7WwbYgqSDXSf4Jl2ayVEnUA:4 a=wPNLvfGTeEIA:10 a=EzXvWhQp4_cA:10 a=ewGtBQ3PczAcCVrb:21 a=tLEkUqEbPkFJTSHR:21 a=rxoNyBSCAAAA:8 a=83aCODDACjicHRdCNpkA:9 a=d608TyoiLupKjbN4qlcA:7 a=PjDch3z0RIbFj_wA5hdLRlO-ubkA:4 a=LJWTG3aW_KUA:10 a=35Tvjzvas7lBNn8+H1IYgA==:117 X-Cloudmark-Score: 0 X-Originating-IP: 69.205.15.200 Received: from [69.205.15.200] ([69.205.15.200:50061] helo=Laptop) by cdptpa-oedge01.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id B5/DF-07087-7D98FFC4; Wed, 08 Dec 2010 13:36:24 +0000 X-Original-Message-ID: From: "Bill Wade" X-Original-To: "Lancair Mailing List" References: In-Reply-To: Subject: Re: [LML] Hydraulic hoses X-Original-Date: Wed, 8 Dec 2010 08:36:28 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_030E_01CB96B3.0236F6A0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18197 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18263 This is a multi-part message in MIME format. ------=_NextPart_000_030E_01CB96B3.0236F6A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Originally, George was concerned and looking for advice (see below). = He got advice. Apart from Scott Krueger, everyone advised him to replace the hoses. = Scott confirmed what he wanted to do, but in his last post George is = grumbling because other people disagree with his plan of action. Scott is correct in that the PIC has responsibility for confirming = airworthiness prior to each flight. He and George both have Repairman's = certificates for their planes so they can maintain them as they see fit. = They are both demonstrating their judgement. I think it's bogus to claim = that anyone should be prepared for a failure without employing = preventive maintenance to avoid having the situation occur. That means = replacing items *before* they fail, even if it may be premature. I personally don't understand what George and Scott think they are = gaining by wrapping. George's plane is down and he has to do the same = work as he would to replace the hoses. When it's all done he'll have the = same old hoses, only disguised. There's no way to tell when they'll = start leaking or burst, and whether the lining is deteriorating. I don't think bragging rights for the oldest hoses amounts to much. It = may also indicate poor practices elsewhere. Airworthiness implies that the aircraft will be maintained so that = systems are equal or better than they were when the certificate was = granted. For example, duct tape may cover a puncture but it doesn't = qualify as a fabric repair. If anything goes wrong and George harms = others as a result he or his estate will have sole responsibility. I = don't think the FAA or any insurance company would be sympathetic. = -Bill Wade =20 ----- Original Message -----=20 From: George and Shirley Shattuck=20 To: lml@lancaironline.net=20 Sent: Wednesday, October 20, 2010 2:36 PM Subject: [LML] Hydraulic hoses Very timely, for me, are recent postings regarding hydraulic hoses. After 16 years, the outer rubber coating on my hoses is starting to = crack and, on many of my hoses, is actually breaking off, revealing the = white woven material. I have been watching this occur with some = concern. The question is: Is this an immediate safety concern? Is there = increased chances of a hose failure, and if so, how big a concern is it. = In other words, should the airplane be immediately grounded until I = fabricate new hoses?=20 These questions are for an experienced hydraulics person, and not for = emotional speculation by those seeking perfection. George Shattuck LNC2, 1350 flight hours ------=_NextPart_000_030E_01CB96B3.0236F6A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
  Originally, George was concerned and looking for advice (see = below). He got advice.
 
  Apart from Scott Krueger, everyone advised him to = replace the=20 hoses. Scott confirmed what he wanted to do, but in his = last post=20 George is grumbling because other people disagree with his = plan of=20 action.
 
  Scott is correct in that the PIC has responsibility for = confirming=20 airworthiness prior to each flight. He and George both have=20 Repairman's certificates for their planes so they can = maintain them as=20 they see fit. They are both demonstrating their judgement. I think = it's=20 bogus to claim that anyone should be prepared for a failure without = employing preventive maintenance to avoid having the situation occur. = That means=20 replacing items *before* they fail, even if it may be premature.
 
  I personally don't understand what George and Scott = think=20 they are gaining by wrapping. George's plane is down = and he=20 has to do the same work as he would to replace the hoses. When it's = all=20 done he'll have the same old hoses, only disguised. There's no way to = tell when=20 they'll start leaking or burst, and whether the lining is = deteriorating.
 
  I don't think bragging rights for the oldest hoses amounts = to much.=20 It may also indicate poor practices elsewhere.
 
   Airworthiness implies that the aircraft will be = maintained so=20 that systems are equal or better than they were when the = certificate was=20 granted. For example, duct tape may cover a puncture but it doesn't = qualify as a=20 fabric repair. If anything goes wrong and George harms = others as a=20 result he or his estate will have sole responsibility. I don't = think the=20 FAA or any insurance company would be sympathetic.  -Bill=20 Wade
 
----- Original Message -----
From:=20 George and Shirley = Shattuck=20
Sent: Wednesday, October 20, = 2010 2:36=20 PM
Subject: [LML] Hydraulic = hoses

Very timely, for me, are recent postings regarding hydraulic = hoses.
 
After 16 years, the outer rubber coating on my hoses is starting = to crack=20 and, on many of my hoses, is actually breaking off, revealing the = white woven=20 material.  I have been watching this occur with some = concern.
 
The question is: Is this an immediate safety concern?  Is = there=20 increased chances of a hose failure, and if so, how big a concern is = it. =20 In other words, should the airplane be immediately grounded until I = fabricate=20 new hoses? 
 
These questions are for an experienced hydraulics person, and not = for=20 emotional speculation by those seeking perfection.
 
George Shattuck
LNC2, 1350 flight hours
------=_NextPart_000_030E_01CB96B3.0236F6A0--