X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 01 Mar 2010 08:44:01 -0500 Message-ID: X-Original-Return-Path: Received: from smtp-auth-04.mx.pitdc1.expedient.net ([206.210.66.137] verified) by logan.com (CommuniGate Pro SMTP 5.3.2) with ESMTPS id 4141812 for lml@lancaironline.net; Mon, 01 Mar 2010 08:30:53 -0500 Received-SPF: none receiver=logan.com; client-ip=206.210.66.137; envelope-from=rpastusek@htii.com Received: from HTBOB001 (66-169-121-46.dhcp.ftwo.tx.charter.com [66.169.121.46]) by smtp-auth-04.mx.pitdc1.expedient.net (Postfix) with ESMTPSA id B969EE4564 for ; Mon, 1 Mar 2010 08:30:17 -0500 (EST) From: "Robert Pastusek" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] LIV-P air mixing box problem X-Original-Date: Mon, 1 Mar 2010 08:30:17 -0500 X-Original-Message-ID: <00c901cab943$5626c810$02745830$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00CA_01CAB919.6D50C010" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Acq45L3PtS40pctEQwelYBT8jQmSXQAXdKTg Content-Language: en-us This is a multi-part message in MIME format. ------=_NextPart_000_00CA_01CAB919.6D50C010 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Doug, As your airplane is much older than mine, you may have a different mixer box, but mine has an aluminum operating arm on the outside that clamps the operating shaft. If this is even a little loose, the arm will swing without turning the shaft.and it's a #4 bolt on mine.easily over-torqued. It's possible that you may have a bit of a burr on the HDPE used to seal across the openings. If so, taking the thing apart and cleaning it up carefully with a sharp knife may help. In any case, this is a pretty simple device inside. I took mine apart to better align the overflow/dump valve for a better seal. Not difficult to work on at all, just some care not to bend the components. Call me if I can be of help. Bob P Doug Johnson wrote: I have a mixing box problem on my IV-P which is new. On a recent flight I pulled the cabin heat knob on in the plane, and got heat as expected. When comfortable, I pushed the knob back in to the normal "heat off" position, but the hot air kept coming in. After the flight, decowled the plane to inspect, and all cables and hoses were still hooked up and operating (the lever arm on the front of the box moved normally with someone in the cockpit pulling and pushing the knob. I took off the hot side inlet hose and poked a flashlight in there. It appears that the rotating opening in the disc that rotates between the hot and cold sides was no longer rotating with axle activated by the pivot arm. Has anyone else seen this? How easy is it to get into this box, and am I likely to find anything fixable? I can manually nudge the disc into the "cold only" position and leave it there, sort of defeats the purpose. Doug ------=_NextPart_000_00CA_01CAB919.6D50C010 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Doug,

As your airplane is = much older than mine, you may have a different mixer box, but mine has an aluminum operating arm on the outside that clamps the operating shaft. If this is = even a little loose, the arm will swing without turning the shaft…and = it’s a #4 bolt on mine…easily over-torqued. It’s possible = that you may have a bit of a burr on the HDPE used to seal across the openings. = If so, taking the thing apart and cleaning it up carefully with a sharp knife = may help. In any case, this is a pretty simple device inside. I took mine = apart to better align the overflow/dump valve for a better seal. Not difficult to = work on at all, just some care not to bend the components.

Call me if I can be = of help.

Bob P

Doug Johnson = wrote:

I have a mixing box problem on my IV-P which is = new. On a recent flight I pulled the cabin heat knob on in the plane, and got heat = as expected. When comfortable, I pushed the knob back in to the normal = “heat off” position, but the hot air kept coming in. After the flight, = decowled the plane to inspect, and all cables and hoses were still hooked up and operating (the lever arm on the front of the box moved normally with = someone in the cockpit pulling and pushing the knob. I took off the hot side inlet = hose and poked a flashlight in there. It appears that the rotating opening in = the disc that rotates between the hot and cold sides was no longer rotating with = axle activated by the pivot arm. Has anyone else seen this? How easy is = it to get into this box, and am I likely to find anything fixable? I can = manually nudge the disc into the “cold only” position and leave it = there, sort of defeats the purpose…

Doug

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