X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 25 Jul 2010 13:36:20 -0400 Message-ID: X-Original-Return-Path: Received: from hrndva-omtalb.mail.rr.com ([71.74.56.125] verified) by logan.com (CommuniGate Pro SMTP 5.3.8) with ESMTP id 4406289 for lml@lancaironline.net; Sun, 25 Jul 2010 11:42:22 -0400 Received-SPF: none receiver=logan.com; client-ip=71.74.56.125; envelope-from=Wolfgang@MiCom.net X-Original-Return-Path: X-Authority-Analysis: v=1.1 cv=NvN00vXXLC/2Fo3NdLZJXFUM7u9qr/FOWvgMjmHRJhk= c=1 sm=0 a=lnMzdYDKHPQA:10 a=MHZY6FYWMEQOp7S43i2QIw==:17 a=pedpZTtsAAAA:8 a=Ia-xEzejAAAA:8 a=JgAQwypiHuV_zBV_acwA:9 a=Zi5Ewpzb5T4MIjRu3PXOgahDu2oA:4 a=wPNLvfGTeEIA:10 a=eJojReuL3h0A:10 a=EzXvWhQp4_cA:10 a=rY5LhhI6sM8DpvPKfVsA:9 a=k6pI4DBRiwSzLYBlDgYA:7 a=_L2FWkm0oDFv7ne54nGw3Q0GfvYA:4 a=MHZY6FYWMEQOp7S43i2QIw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 74.218.201.50 Received: from [74.218.201.50] ([74.218.201.50:1273] helo=Lobo) by hrndva-oedge01.mail.rr.com (envelope-from ) (ecelerity 2.2.2.39 r()) with ESMTP id 68/C9-03317-A3B5C4C4; Sun, 25 Jul 2010 15:41:46 +0000 X-Original-Message-ID: <000a01cb2c0f$e2e26310$6401a8c0@Lobo> From: "Wolfgang" X-Original-To: Subject: LIV-P Bad Master relay??? X-Original-Date: Sun, 25 Jul 2010 11:41:44 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01CB2BEE.5B905EB0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0007_01CB2BEE.5B905EB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable The accumulator is not your problem.=20 I doubt that pressure switches or master relay are your problem either. If the system does not get up to pressure, the pump will keep running. Your pump may have a bad o-ring causing it to not give full pressure.=20 Put some pressure gages on the system and see what's happening. Wolfgang From: "Doug Johnson" =20 Sender: =20 Subject: LIV-P Bad Master relay???=20 Date: Sat, 24 Jul 2010 15:21:10 -0400=20 To: lml@lancaironline.net=20 =20 =20 Folks, I have a question: What would be the symptoms of a master = relay or pressure switch going bad with reference to the hydraulic = system? The plane: IV-P, about 1150hrsTT, in the air over 13years now The issue: I have had a couple of intermittent (i.e., = un-reproducible) issues related to 1) the flaps having difficulty = deploying against resistance at anything over 140kts (used to be no = sweat putting them down at 172kts); and 2) a couple of times the amber = hydraulic power pack "on" light stays on constantly. In terms of #1, I = replaced the accumulator with a partially used one (Lancair was out of = stock) and it only partially helped the problem. I now have a new one = from Lancair, and plan on installing it this week. #2 has me perplexed, = however. Just in the last couple of weeks, I have had time when the = amber light (hydraulic pump) won't go out. After a minute or so, I had = to pull the 50amp circuit breaker, and when I re-set it, the pump and = light stayed off. Today, however, there was a new twist-after landing, = I put the flap handle UP and nothing happened-the flaps didn't move, and = the pump did not come on. I recycled the flap handle a couple of times = and the pump came on, flaps came up, and pump STAYED on. Pulled and = reset 50 circuit breaker, and pump went off but then right back on with = the reset CB!. I shut down completely, and then fired back up-all was = well. Of note, there has been no problem or lag with the gear rectract = or deployment that I can tell. So, I am wondering if there is more than just a weak accumulator = going on here. Does this story sound familiar to anyone? Anything else I = should look at while I am at it? Does it sound like a bad master relay = or pressure switch?=20 Thanks in advance for your thoughts/advice. Doug Johnson, MD=20 =20 ------=_NextPart_000_0007_01CB2BEE.5B905EB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
The accumulator is not your problem. =
I doubt that pressure switches or = master relay are=20 your problem either.
If the system does not get up to = pressure, the pump=20 will keep running.
Your pump may have a bad o-ring causing = it to not=20 give full pressure.
Put some pressure gages on the system = and see=20 what's happening.
 
Wolfgang
 
 
lml@lancaironline.net
From: "Doug Johnson"=20 <Lancair1@bellsouth.net>
Sender: <marv@lancaironline.net>
Subject: LIV-P Bad Master = relay???
Date: Sat, 24 Jul 2010 15:21:10 = -0400
To:

Folks, I have a question: What would be = the=20 symptoms of a master relay or pressure switch going bad with = reference to=20 the hydraulic system?

The plane: IV-P, about 1150hrsTT, in = the air over=20 13years now

The issue: I have had a couple of = intermittent=20 (i.e., un-reproducible) issues related to  1) = the flaps=20 having difficulty deploying against resistance =  at=20 anything over 140kts (used to be no sweat putting them down at = 172kts);=20 and 2) a couple of times the amber hydraulic power pack =93on=94 = light stays=20 on constantly.  In terms of #1, I replaced the=20 accumulator with a partially used one (Lancair was out of stock) = and it=20 only partially helped the problem. I now have a new one from = Lancair, and=20 plan on installing it this week. #2 has me perplexed, however. = Just in the=20 last couple of weeks, I have had time when the amber light = (hydraulic=20 pump) won=92t go out. After a minute or so, I had to pull the = 50amp circuit=20 breaker, and when I re-set it, the pump and light stayed off. = Today,=20 however, there was  a new twist=97after landing, = I put the=20 flap handle UP and nothing happened=97the flaps didn=92t move, and = the pump=20 did not come on. I recycled the flap handle a couple of times and = the pump=20 came on, flaps came up, and pump STAYED on. Pulled and reset 50 = circuit=20 breaker, and pump went off but then right back on with the reset = CB!. I=20 shut down completely, and then fired back up=97all was well. Of = note, there=20 has been no problem or lag with the gear rectract or deployment that I can tell.

So, I am wondering if there is more = than just a=20 weak accumulator going on here. Does this story sound familiar to = anyone?=20 Anything else I should look at while I am at it? Does it sound = like a bad=20 master relay or pressure switch?

Thanks in advance for your = thoughts/advice.

Doug Johnson, MD

------=_NextPart_000_0007_01CB2BEE.5B905EB0--