X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 11 Sep 2006 00:37:48 -0400 Message-ID: X-Original-Return-Path: Received: from imo-d20.mx.aol.com ([205.188.139.136] verified) by logan.com (CommuniGate Pro SMTP 5.1c.3) with ESMTP id 1372740 for lml@lancaironline.net; Sun, 10 Sep 2006 12:45:55 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.139.136; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d20.mx.aol.com (mail_out_v38_r7.6.) id q.554.68ce531 (29678) for ; Sun, 10 Sep 2006 12:45:11 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <554.68ce531.32359b17@aol.com> X-Original-Date: Sun, 10 Sep 2006 12:45:11 EDT Subject: Re: [LML] High Altitude Oxygen Failure X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1157906711" X-Mailer: 9.0 Security Edition for Windows sub 5330 X-Spam-Flag: NO -------------------------------1157906711 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 9/10/2006 11:37:24 A.M. Central Standard Time, rosenzweig2@verizon.net writes: Passing FL190, I heard an aural warning from the EDS 02D2 controller and quickly realized oxygen had stopped flowing (it's a new, freshly filled tank). I quickly turned the controller to R/M (manual) expecting to get a positive flow but nothing was happening. I had a fresh set of batteries installed and there were no red failure lights showing. Needless to say, the effects of hypoxia come on quickly and I immediately initiated a descent. Back on the ground I found that if I turned the unit off then back on, it would work again. I plan on calling MH on Monday and asking them about it, but wanted to see if anyone in the group knows if this problem was related to not using the face mask at the prescribed altitude. Steve, Yes, MH expects to develop pressure in a sealed face mask above 18000 feet. See the first article at: _http://www.mhoxygen.com/index.phtml?nav_id=7_ (http://www.mhoxygen.com/index.phtml?nav_id=7) It could be that it shut off because no pressure could be developed. Note what happens to the physiology of breathing at those high altitudes. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Everything in moderation. -------------------------------1157906711 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 9/10/2006 11:37:24 A.M. Central Standard Time,=20 rosenzweig2@verizon.net writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>

Passing FL190, I heard an aural warning from the E= DS=20 02D2 controller and quickly realized oxygen had stopped flowing (it's= a=20 new, freshly filled tank). I quickly turned the controller to R/M=20 (manual) expecting to get a positive flow but nothing was=20 happening. I had a fresh set of batteries installed and there were n= o=20 red failure lights showing. Needless to say, the effects of hypoxia=20= come=20 on quickly and I immediately initiated a descent.

Back on the ground I found that if I turned the un= it off=20 then back on, it would work again.

I plan on calling MH on Monday and asking them abo= ut it,=20 but wanted to see if anyone in the group knows if this problem was related= to=20 not using the face mask at the prescribed altitude. =20

Steve,

Yes, MH expects to develop pressure in a sealed face mask above 18000=20 feet. See the first article at:

http://www.mhoxygen.= com/index.phtml?nav_id=3D7

It could be that it shut off because no pressure could be developed.&nb= sp;=20 Note what happens to the physiology of breathing at those high altitudes.

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL=20 (KARR)

Everything in moderation.

-------------------------------1157906711--