X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 15 Nov 2005 21:41:10 -0500 Message-ID: X-Original-Return-Path: Received: from [207.254.33.66] (HELO DEWEY2.Cadwell.cadwell.com) by logan.com (CommuniGate Pro SMTP 5.0.1) with ESMTP id 831514 for lml@lancaironline.net; Tue, 15 Nov 2005 11:58:14 -0500 Received-SPF: none receiver=logan.com; client-ip=207.254.33.66; envelope-from=CarlC@Cadwell.com Subject: Decreasing manifold pressure X-Original-Date: Tue, 15 Nov 2005 08:57:28 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C5EA05.A937315A" X-Original-Message-ID: <63D0A1D8F168684F8502C4B8A229D791F1D151@DEWEY2.Cadwell.cadwell.com> Content-class: urn:content-classes:message X-MS-Has-Attach: X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 X-MS-TNEF-Correlator: Thread-Topic: Decreasing manifold pressure Thread-Index: AcXqBakonMSgIwRQRQqPn3DQHU/h5Q== From: "Carl Cadwell" X-Original-To: This is a multi-part message in MIME format. ------_=_NextPart_001_01C5EA05.A937315A Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable It has happened 3 times now. Once in July, once in Aug and again Sunday. At Fl 240-250 when I pull on the cabin heat, occasionally the manifold pressure starts to slowly fall off and the airspeed declines. (30" down to 26") If the cabin heat is turned down or off, the manifold pressure returns. I replaced the SKEET tubing from the hot side to the mixer valve as I found 2 very small leaks. I thought this had fixed the problem. The problem returned Sunday. It does not happen all the time. It does not happen at FL130-160. Any clues as to the cause and where to look next? Carl Cadwell N25CL, IVP 870 hours on TCM TSIO 550E ------_=_NextPart_001_01C5EA05.A937315A Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Decreasing manifold pressure

It = has happened 3 times now.  Once in July, once in Aug and again = Sunday.  At Fl 240-250 when I pull on the cabin heat, occasionally  the manifold = pressure starts to slowly fall = off and the airspeed declines.  (30” down to 26”)  If the cabin heat is turned down or off, the = manifold pressure returns.  I replaced the SKEET tubing from the = hot side = to the mixer valve as I found 2 very small leaks.  I thought this had fixed the problem.  The problem returned Sunday.  It does not happen all the time.  It does not happen at FL130-160.  Any clues as to the cause and where to look next?

Carl = Cadwell

N25CL, IVP 870 hours on TCM TSIO 550E

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