X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 20 Jun 2011 19:55:18 -0400 Message-ID: X-Original-Return-Path: Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTP id 5026421 for lml@lancaironline.net; Mon, 20 Jun 2011 15:15:31 -0400 Received-SPF: pass receiver=logan.com; client-ip=71.74.56.122; envelope-from=kkellner1@new.rr.com X-Original-Return-Path: X-Authority-Analysis: v=1.1 cv=yMxAJ7W7nAoPh8ZdbvCArpG6pAdHwgpzIvOq8QbMesM= c=1 sm=0 a=obLwkm3ISv3u5N1fLH+lKQ==:17 a=Ia-xEzejAAAA:8 a=RfGYxpr5_xGPMY0kQ9oA:9 a=6sgfuNH9gKbhUKEFX9UA:7 a=wPNLvfGTeEIA:10 a=TJ8BTsuZbegA:10 a=EzXvWhQp4_cA:10 a=tQSjJnP2OZCn0JOY:21 a=XT8pIpGvBzcLy8hC:21 a=SSmOFEACAAAA:8 a=Y2VNeNrzAAAA:8 a=yMhMjlubAAAA:8 a=TW66zc2HAAAA:8 a=HQ31llbKAAAA:8 a=LJNHRzvFAAAA:8 a=bRowP1O46AnRhyURD0EA:9 a=7W3s7AxrACn8b2jR8lEA:7 a=3q8PDF_K8bIA:10 a=Wib1amFwB6s0aOD7:21 a=Jt3SV6BEnxDPaKdy:21 a=obLwkm3ISv3u5N1fLH+lKQ==:117 X-Cloudmark-Score: 0 X-Originating-IP: 70.92.78.168 Received: from [70.92.78.168] ([70.92.78.168:2064] helo=D4SSJS91) by hrndva-oedge01.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 0A/CD-07441-03C9FFD4; Mon, 20 Jun 2011 19:14:57 +0000 X-Original-Message-ID: <9033365EEAA14FDC85D355CE60107743@D4SSJS91> From: "Ken" X-Original-To: References: Subject: Re: Door Seal on the IV-P X-Original-Date: Mon, 20 Jun 2011 14:14:55 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_019E_01CC2F54.6E2971F0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6109 This is a multi-part message in MIME format. ------=_NextPart_000_019E_01CC2F54.6E2971F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Bob, I don't have the main gear drawing that you are looking for, but I do have = some pictures of the down lock and components. The spring force holding th= e down lock pin in the down position is a series of Belleville washers. Last July, on take off, down lock pin, retaining cup, and washers ejected f= rom the right cylinder. There was no damage to the circlip or the retainin= g groove so I can only assume the circlip was not originally installed prop= erly. I have no idea why it lasted 150 hours and then decided to let go. = I found all of the parts, less a few of the washers, in the wheel well afte= r landing. I'll send you the pictures off line because of the file size. = If anyone else wants them just let me know. If you hear a loud POP during gear retraction, and it doesn't sound the sam= e as the gear doors closing, and your hydraulic pump keeps running, and you= r flaps wont retract, I would suspect the down lock pin exiting the gear cy= linder is a possibility. The emergency hand pump still works just fine. T= here is enough fluid in the reservoir below the electric pump pick up point= Keep in mind that the down lock pin is gone so the bleed through in the = system along with the airflow against the gear in the down position is enou= gh to make the offending gear move off of the full down position and the ge= ar light may start winking at you on final so be ready to give it a stroke = or two on short final. Maintain full aft elevator after landing and be eas= y on the brakes to avoid having the offending gear leg roll over center and= collapse. Ken Kellner LOBO Member IV-P N14LK ----- Original Message -----=20 From: Robert R Pastusek=20 To: lml@lancaironline.net=20 Sent: Saturday, June 18, 2011 8:15 AM Subject: Door Seal on the IV-P Gentlemen, =20 I just completed the third condition inspection on N437RP at 680 hours TT= The airplane is in excellent condition; I found no cracks or structural p= roblems at all, but could use some help with two issues. =20 If anyone has a breakdown drawing of the main gear actuator for the IV/IV= -P, I'd really like to have a copy. My right main gear actuator has develop= ed a small hydraulic leak around the downlock pin that sticks out of the to= p of the actuator base. I constructed the airplane with a removable top to = the wheelwell, so I can stand up in the wheelwell and access the rear of th= is actuator, but the space is tight. I suspect the downlock pin is held dow= n by a rather strong spring, so removing the circlip that retains the assem= bly without a clamp or tool would probably result in not being able to rein= stall it. If you have any experience with servicing this seal, or removing = the whole actuator, I'd appreciate any advice. =20 Second problem: I have a small pin hole in the "sidewall" of my door pre= ssure seal. It's so small that the seal will retain pressure for a short pe= riod, causing the pressurization pump to cycle on every few seconds. I woul= d like to hear from anyone that's tried to patch such a hole. =20 Many thanks in advance, Bob Pastusek 757-286-4802 cell =20 ------=_NextPart_000_019E_01CC2F54.6E2971F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Bob,
 
I don't have the main gear drawing that you are looking for, but I do = have=20 some pictures of the down lock and components.  The spring force holdi= ng=20 the down lock pin in the down position is a series of Belleville washers.
 
Last July, on take off, down lock pin, retaining cup, and washers= =20 ejected from the right cylinder.  There was no damage to the circlip o= r the=20 retaining groove so I can only assume the circlip was not=20 originally installed properly.  I have no idea why it l= asted=20 150 hours and then decided to let go.  I found all of the parts, less = a few=20 of the washers, in the wheel well after landing.  I'll send you the=20 pictures off line because of the file size.  If anyone else wants them= just=20 let me know.
 
If you hear a loud POP during gear retraction, and it doesn't sound th= e=20 same as the gear doors closing, and your hydraulic pump keeps running, and = your=20 flaps wont retract, I would suspect the down lock pin exiting the gear cyli= nder=20 is a possibility.  The emergency hand pump still works just fine. = ;=20 There is enough fluid in the reservoir below the electric pump pick up=20 point.  Keep in mind that the down lock pin is gone so the bleed throu= gh in=20 the system along with the airflow against the gear in the down position is= =20 enough to make the offending gear move off of the full down position and th= e=20 gear light may start winking at you on final so be ready to give it a strok= e or=20 two on short final.  Maintain full aft elevator after landing and be e= asy=20 on the brakes to avoid having the offending gear leg roll over center and= =20 collapse.
 
Ken Kellner
LOBO Member
IV-P  N14LK
 
 
----- Original Message -----
Fro= m:=20 Robert R= =20 Pastusek
Sent: Saturday, June 18, 2011 8:15= =20 AM
Subject: Door Seal on the IV-P

Gentlemen,

 

I=20 just completed the third condition inspection on N437RP at 680 hours TT. = The=20 airplane is in excellent condition; I found no cracks or structural probl= ems=20 at all, but could use some help with two issues.

 

If=20 anyone has a breakdown drawing of the main gear actuator for the IV/IV-P,= I=92d=20 really like to have a copy. My right main gear actuator has developed a s= mall=20 hydraulic leak around the downlock pin that s= ticks=20 out of the top of the actuator base. I constructed the airplane with a=20 removable top to the wheelwell, so I can stan= d up in=20 the wheelwell and access the rear of this act= uator,=20 but the space is tight. I suspect the downlock pin=20 is held down by a rather strong spring, so removing the circlip that retains the assembly without a clamp o= r tool=20 would probably result in not being able to reinstall it. If you have any= =20 experience with servicing this seal, or removing the whole actuator, I=92= d=20 appreciate any advice.

 

Second=20 problem: I have a small pin hole in  the =93sidewall=94 of my door pr= essure=20 seal. It=92s so small that the seal will retain pressure for a short peri= od,=20 causing the pressurization pump to cycle on every few seconds. I would li= ke to=20 hear from anyone that=92s  = tried to=20 patch such a hole.

 

Many=20 thanks in advance,


Bob=20 Pastusek

757-286-4802=20 cell

 

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