X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 05 Feb 2012 20:41:28 -0500 Message-ID: X-Original-Return-Path: Received: from oproxy4-pub.bluehost.com ([69.89.21.11] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with SMTP id 5383955 for lml@lancaironline.net; Sun, 05 Feb 2012 15:16:09 -0500 Received-SPF: pass receiver=logan.com; client-ip=69.89.21.11; envelope-from=danny@n107sd.com Received: (qmail 22347 invoked by uid 0); 5 Feb 2012 20:15:32 -0000 Received: from unknown (HELO host295.hostmonster.com) (66.147.240.95) by cpoproxy1.bluehost.com with SMTP; 5 Feb 2012 20:15:32 -0000 Received: from pool-71-114-9-149.washdc.dsl-w.verizon.net ([71.114.9.149] helo=DannyLaptop) by host295.hostmonster.com with esmtpa (Exim 4.76) (envelope-from ) id 1Ru8Uk-0007Bg-Gz for lml@lancaironline.net; Sun, 05 Feb 2012 13:15:32 -0700 From: "Danny" X-Original-To: Subject: LNC2 landing gear issue X-Original-Date: Sun, 5 Feb 2012 15:15:27 -0500 X-Original-Message-ID: <00a001cce442$e848c780$b8da5680$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00A1_01CCE418.FF72BF80" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AczkQuaPPYctz/inQImohMGbMjgU1Q== Content-language: en-us X-Identified-User: {3234:host295.hostmonster.com:wunderwe:n107sd.com} {sentby:smtp auth 71.114.9.149 authed with danny@n107sd.com} This is a multi-part message in MIME format. ------=_NextPart_000_00A1_01CCE418.FF72BF80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable My main gear actuators were leaking so I overhauled them. This isn=92t = a big deal and I=92ve done this numerous times on spam cans with no problems. = Upon reinstallation I found two situations; the left main wouldn=92t respond = at all; the inboard and nose wheel doors wouldn=92t stay closed. Since = this is a closed system and I could see signs of leakage on at least one gear door actuator, I figured before messing with the gear I better rebuild the = gear door actuators too. I did that, reassembled everything, and ran leak = checks after cleaning the previous leak mess. Now, this situation = remains=85sort of. =20 After several gear cycles, the left main wouldn=92t break the over = center down lock. I decided to tap it with a rubber mallet to break it loose just = to see what happens. At that point the pump kicks on and the wheel goes up = but the doors still bleed down and open after less than a minute. I now = have probably a dozen or so gear cycles and, although the left main is now responding, it=92s the last to do so but only after what must be called = a burp in the system. By that, I mean the other two legs go up, the pump stops momentarily and then kicks back on to take the last leg up. But, the = doors still bleed down and come open in less than a minute. I can't see any visible leaks so this tells me there must be an internal leak someplace. The question is where? Can the sequencing valves cause this or is it = the emergency extension ball valve or something else? And how do you check these items for internal leakage? Any suggestions would be appreciated. =20 Thanks in advance, =20 Danny LNC2-360, 550 hours N 38=B0 43' 25.7" W 77=B0 30' 38.6" =20 ------=_NextPart_000_00A1_01CCE418.FF72BF80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

My = main gear actuators were leaking so I overhauled them.=A0 This isn’t a big deal and = I’ve done this numerous times on spam cans with no problems.=A0 Upon reinstallation I found two = situations; the left main wouldn’t respond at all; the inboard and = nose wheel doors wouldn’t stay closed.=A0 Since this is a closed system and = I could see signs of leakage on at least one gear door actuator, I = figured before messing with the gear I better rebuild the gear door = actuators too.=A0 I did that, = reassembled everything, and ran leak checks after cleaning the previous = leak mess.=A0 Now, this = situation remains…sort of.

 

After several gear cycles, the left = main wouldn’t break the over center down lock.=A0 I decided to tap it with a rubber = mallet to break it loose just to see what happens.=A0 At that point the pump kicks on = and the wheel goes up but the doors still bleed down and open after less = than a minute.=A0 I now have = probably a dozen or so gear cycles and, although the left main is now = responding, it’s the last to do so but only after what must be = called a burp in the system.=A0 = By that, I mean the other two legs go up, the pump stops = momentarily and then kicks back on to take the last leg up.=A0 But, the doors still bleed down = and come open in less than a minute.=A0 = I can't see any visible leaks so this tells me there must be an = internal leak someplace.=A0 The = question is where?=A0 Can the = sequencing valves cause this or is it the emergency extension ball valve = or something else?=A0 And how do = you check these items for internal leakage?=A0 Any suggestions would be = appreciated.

 

Thanks in = advance,

 

Danny

LNC2-360, 550 = hours

N 38=B0 43' = 25.7"

W 77=B0 30' = 38.6"

 

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