X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Sun, 10 Sep 2006 12:36:58 -0400 Message-ID: X-Original-Return-Path: Received: from vms040pub.verizon.net ([206.46.252.40] verified) by logan.com (CommuniGate Pro SMTP 5.1c.3) with ESMTP id 1372669 for lml@lancaironline.net; Sun, 10 Sep 2006 11:36:49 -0400 Received: from HOMEFAMILY1 ([71.105.179.88]) by vms040.mailsrvcs.net (Sun Java System Messaging Server 6.2-4.02 (built Sep 9 2005)) with ESMTPA id <0J5D00A5KVD2COM9@vms040.mailsrvcs.net> for lml@lancaironline.net; Sun, 10 Sep 2006 10:36:41 -0500 (CDT) X-Original-Date: Sun, 10 Sep 2006 08:36:43 -0700 From: "Steve Rosenzweig" Subject: High Altitude Oxygen Failure X-Original-To: "Lancair Mailing List" X-Original-Message-id: <003701c6d4ee$eb4bdbc0$6401a8c0@HOMEFAMILY1> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 X-Mailer: Microsoft Outlook Express 6.00.2900.2869 Content-type: multipart/alternative; boundary="----=_NextPart_000_0034_01C6D4B4.3E8FEFA0" X-Priority: 3 X-MSMail-priority: Normal References: This is a multi-part message in MIME format. ------=_NextPart_000_0034_01C6D4B4.3E8FEFA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Just wanted to relate an experience I had Saturday. Back at the Lancair = fly-in, I purchased a Mountain High O2 pulse demand system. I've used = it a few times just getting familiar with it and Saturday I decided to = evaluate it at the service ceiling for my 360. The system was working great up to 18,000 ft. Now I have to admit, I = was using the cannula and didn't initially plan on going above 18000 ft. = However, I did have the face mask with me which you're supposed to use = at 18000 and above. Yes, the instructions say the mask must be used at = 18000. Well, things were going well and the aircraft was handling well and I = had plenty of performance available to go higher so I decided to pick up = an IFR clearance to maneuver in the class A above my field. 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. =20 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. =20 In any event, another good lesson to learn from. The face mask I had = was the one that came with the system, no mic, so I needed to use the = cannula to allow me to talk to ATC. Then I felt changing to the mask at = altitude was not practicle either. Guess I'll need to invest in one of = those fancy masks with a mic installed! Steve Rosenzweig LNC 360 MK II N171DK Lancaster, CA ------=_NextPart_000_0034_01C6D4B4.3E8FEFA0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Just wanted to relate an experience I had = Saturday. =20 Back at the Lancair fly-in, I purchased a Mountain High O2 pulse demand=20 system.  I've used it a few times just getting familiar with it and = Saturday I decided to evaluate it at the service ceiling for my=20 360.
 
The system was working great up to 18,000 = ft.  Now I=20 have to admit, I was using the cannula and didn't initially plan on = going above=20 18000 ft.  However, I did have the face mask with me which you're = supposed=20 to use at 18000 and above. Yes, the instructions say the mask must be = used at=20 18000.
 
Well, things were going well and the aircraft = was handling=20 well and I had plenty of performance available to go higher so I decided = to pick=20 up an IFR clearance to maneuver in the class A above my = field.
 
Passing FL190, I heard an aural warning from the = EDS=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 = (manual)=20 expecting to get a positive flow but nothing was happening.  I = had a=20 fresh set of batteries installed and there were no red failure lights=20 showing.  Needless to say, the effects of hypoxia come on quickly = and I=20 immediately initiated a descent. 
 
Back on the ground I found that if I turned the = unit off=20 then back on, it would work again.
 
I plan on calling MH on Monday and asking them = about 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. 
 
In any event, another good lesson to learn = from.  The=20 face mask I had was the one that came with the system, no mic, so I = needed to=20 use the cannula to allow me to talk to ATC.  Then I felt changing = to the=20 mask at altitude was not practicle either.  Guess I'll need to = invest in=20 one of those fancy masks with a mic installed!
 
Steve Rosenzweig
LNC 360 MK II
N171DK
Lancaster, CA
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