X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 25 May 2010 16:13:06 -0400 Message-ID: X-Original-Return-Path: Received: from [216.200.145.38] (HELO omta0111.mta.everyone.net) by logan.com (CommuniGate Pro SMTP 5.3.7) with ESMTP id 4325830 for lml@lancaironline.net; Tue, 25 May 2010 15:29:26 -0400 Received-SPF: none receiver=logan.com; client-ip=216.200.145.38; envelope-from=bknotts@buckeye-express.com Received: from dm0219.mta.everyone.net (sj1-slb03-gw2 [172.16.1.96]) by omta0111.mta.everyone.net (Postfix) with ESMTP id 9D69A752E3C for ; Tue, 25 May 2010 12:28:49 -0700 (PDT) X-Eon-Dm: dm0219 Received: by dm0219.mta.everyone.net (EON-AUTHRELAY2 - 1835a814) id dm0219.4bfbd2c1.2e95e for ; Tue, 25 May 2010 12:28:49 -0700 X-Eon-Sig: AQK8DXBL/CTxfQGD5AIAAAAB,365bc8ef580599a8c119d7ad23c0dc88 X-Original-Message-ID: <4BFC24F3.9090401@buckeye-express.com> X-Original-Date: Tue, 25 May 2010 15:28:51 -0400 From: "F. Barry Knotts" Reply-To: bknotts884@earthlink.net User-Agent: Thunderbird 2.0.0.24 (Windows/20100228) MIME-Version: 1.0 X-Original-To: Lancair Mailing List Subject: Re: [LML] Pressurization problem References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------090800070505040205030609" This is a multi-part message in MIME format. --------------090800070505040205030609 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit I don't know if it's possible, but could the pressurization adjustment knob been forced into a complete revolution? I'll bet that would confuse the system into thinking it was on or under the ground at all times. Just a thought. Barry Knotts LIV-P zoelt@sio.midco.net wrote: > > Cabin won't pressurize. Visitor shopping for a 4P was sitting in > cabin with a battery charger on the battery supposedly studying the > cheltons but I suspect he was pushing every button and switch he > could. Now pressure valve won't close. I can hear the dump switch > and gear handle switch both clicking in the valve but it doesn't move > up or down. Removed the valve and checked for travel. I can manually > close it on the bench but it immediately opens again. With > pressurized air flowing in (vacume cleaner hooked up in reverse) I can > depress the valve with my fingers and almost get it to seal but it > immediately opens. Is there another safety switch in the pitot system > somewhere? Any idea where? > > I'd appreciate any advice. > > Thanks, > > Tim, N524JG, LNC4P, Ser# 411 > --------------090800070505040205030609 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit I don't know if it's possible, but could the pressurization adjustment knob been forced into a complete revolution? I'll bet that would confuse the system into thinking it was on or under the ground at all times.

Just a thought.

Barry Knotts
LIV-P

zoelt@sio.midco.net wrote:

Cabin won’t pressurize. Visitor shopping for a 4P was sitting in cabin with a battery charger on the battery supposedly studying the cheltons but I suspect he was pushing every button and switch he could. Now pressure valve won’t close. I can hear the dump switch and gear handle switch both clicking in the valve but it doesn’t move up or down. Removed the valve and checked for travel. I can manually close it on the bench but it immediately opens again. With pressurized air flowing in (vacume cleaner hooked up in reverse) I can depress the valve with my fingers and almost get it to seal but it immediately opens. Is there another safety switch in the pitot system somewhere? Any idea where?

I’d appreciate any advice.

Thanks,

Tim, N524JG, LNC4P, Ser# 411

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