Return-Path: Sender: (Marvin Kaye) To: lml Date: Thu, 23 May 2002 16:30:06 -0400 Message-ID: X-Original-Return-Path: Received: from smtp.bendcable.com ([216.228.160.33] verified) by logan.com (CommuniGate Pro SMTP 4.0b1) with ESMTP id 1246181 for lml@lancaironline.net; Thu, 23 May 2002 16:25:34 -0400 Received: from smtp.bendcable.com (unverified [192.168.17.33]) by smtp.bendcable.com (Rockliffe SMTPRA 4.5.6) with SMTP id for ; Thu, 23 May 2002 13:24:34 -0700 Received: FROM ValuedSonyCustomer BY smtp.bendcable.com ; Thu May 23 13:24:34 2002 -0700 X-Original-Message-ID: <000f01c20297$812fb5a0$d3b2e4d8@bendcable.com> From: "fili" X-Original-To: "Lancair Mailing List" References: Subject: LNC-IV hydraulic pump 'cycles' X-Original-Date: Thu, 23 May 2002 13:22:04 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01C2025C.D4B873A0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 This is a multi-part message in MIME format. ------=_NextPart_000_000C_01C2025C.D4B873A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable We have the hydraulic pump on our airplane 'cycle' about every 3-5 = minutes while on the ground as well as in flight, which means that it = runs for a second or so every once in a while. We ruled out the = possibility of air bubbles since the oil has been in the system for = quite some time, and we had cycled the gears really many times with the = airplane on its jacks. We knew it was due to an internal leak somewhere = in the system but did not know where, and certainly knew it would be a = PITA trying to trouble-shoot that. Then, I recently tried leaving the = flaps down and noticed that when I turn the master switch back on, the = hydraulic pump doesn't make a sound. I have had the flaps down for now = 24 hours and the system still holds the pressure. I am curious to know if anyone else's airplane behaves the same way and = also if anyone here thinks the gear/flap selector assembly has been = designed that way, I don't know, maybe it is bad for the system to stay = pressurised for extend periods of time ? Thanks, fili ------=_NextPart_000_000C_01C2025C.D4B873A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

We have the hydraulic pump on our = airplane 'cycle'=20 about every 3-5 minutes while on the ground as well as in flight, which = means=20 that it runs for a second or so every once in a while. We ruled out the=20 possibility of air bubbles since the oil has been in the system for = quite some=20 time, and we had cycled the gears really many times with the airplane on = its=20 jacks. We knew it was due to an internal leak somewhere in the system = but did=20 not know where, and certainly knew it would be a PITA trying to = trouble-shoot=20 that. Then, I recently tried leaving the flaps down and noticed that = when I turn=20 the master switch back on, the hydraulic pump doesn't make a sound. I = have had=20 the flaps down for now 24 hours and the system still holds the=20 pressure.

I am curious to know if anyone else's = airplane=20 behaves the same way and also if anyone here thinks the gear/flap = selector=20 assembly has been designed that way, I don't know, maybe it is bad for = the=20 system to stay pressurised for extend periods of time ?

Thanks, fili

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