X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Tue, 12 Sep 2006 14:55:41 -0400 Message-ID: X-Original-Return-Path: <5zq@cox.net> Received: from eastrmmtao06.cox.net ([68.230.240.33] verified) by logan.com (CommuniGate Pro SMTP 5.1c.3) with ESMTP id 1377382 for lml@lancaironline.net; Tue, 12 Sep 2006 12:55:27 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.240.33; envelope-from=5zq@cox.net Received: from eastrmimpo01.cox.net ([68.1.16.119]) by eastrmmtao06.cox.net (InterMail vM.6.01.06.01 201-2131-130-101-20060113) with ESMTP id <20060912165443.LMXG18839.eastrmmtao06.cox.net@eastrmimpo01.cox.net> for ; Tue, 12 Sep 2006 12:54:43 -0400 Received: from OFFICE ([72.192.254.103]) by eastrmimpo01.cox.net with bizsmtp id MUuK1V0082EdYPc0000000 Tue, 12 Sep 2006 12:54:26 -0400 X-Original-Message-ID: <004e01c6d68c$22e423a0$6401a8c0@OFFICE> From: "Bill&Sue" <5zq@cox.net> X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: High Altitude Oxygen Failure X-Original-Date: Tue, 12 Sep 2006 12:54:38 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 Hello Mark, I believe that your description of oxygen partial pressure is essentially correct. I am not advocating using a canula above 18 (although I have used one up to 21 without problem) I am unable, however, to find any requirement for part 91 operators to use a pressure mask above 18 as you state. Where did you find this FAA requirement? Thanks. Bill Harrelson N5ZQ 320 1,250 hrs N6ZQ IV 12% > One person may be > fine with a cannula up to 35,000ft; another might not make it much past > 18,000ft -- the altitude at which the FAA requires one to wear a mask > providing positive pressure.