Return-Path: Received: from pop3.olsusa.com ([63.150.212.2] verified) by logan.com (CommuniGate Pro SMTP 3.5.9) with ESMTP id 1165080 for rob@logan.com; Sun, 14 Apr 2002 13:39:12 -0400 Received: from webterminator28.CRYSTALTECH.COM ([216.119.106.29]) by pop3.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-71866U8000L800S0V35) with ESMTP id com for ; Sun, 14 Apr 2002 13:24:32 -0400 Received: from c1338263c [12.234.209.102] by webterminator28.CRYSTALTECH.COM (SMTPD32-7.06) id A03614CA00A2; Sun, 14 Apr 2002 09:37:10 -0700 Message-ID: <005101c1e3d2$bdc312c0$66d1ea0c@attbi.com> From: "Larry Graves" To: References: <123.f124ab3.29ea8bda@aol.com> Subject: Re: SIERRA FLIGHT SYSTEMS OAT ERROR? Date: Sun, 14 Apr 2002 09:38:00 -0700 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Assuming the SFS software is good, try locating the OAT probe in the cowling inlet lip. Won't get any hot air from anywhere else on the airplane up there (until you go supersonic, that is ;-). Firewall pass-through makes this problematic unless you've got some "growth" bulkhead connectors & pass-throughs already built-in up front... Best Regards, Larry Graves AirCrafters Builder Education Center Construction, Maintenance & Repair 140 Aviation Way, Watsonville, CA 831-722-9141 www.AirCraftersLLC.com ----- Original Message ----- > I have a SFS system EFIS in a IVP which is experiencing errors in OAT > readings. The reading at FL 220 was about 34 F when really it was probably > some 30 - 40 degrees cooler than that. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://members.olsusa.com/mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please remember that purchases from the Builders' Bookstore assist with the management of the LML. Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>