O2 and Cypriot airliner crash

Martin Hotze wrote:

On Mon, 15 Aug 2005 18:54:18 GMT, George Patterson wrote:


If the aircraft loses pressure at 35,000', you cannot hold your breath. The
pressure difference will force you to exhale. Nothing you can do about it.


but apparently there was enough time to write a short message on the cell
phone and send it - if one can trust the news (*doh*).

You can't.

Matt

In article %N5Me.1542$yb.46@trndny01,
George Patterson wrote:

Because of this, the FAA requires that a pilot use oxygen if they
spend over 30 minutes above 12,500'.

My recollection of my O2 training is that the rule is 30 minutes over
10,000 ft, or if you go over 12,500 ft at *all*.

But I've only been to about 20,000 ft in a glider, unlike some people I
know who have been far higher.

--
Bruce | 41.1670S | \ spoken | -+-
Hoult | 174.8263E | /\ here. | ----------O----------

"Bruce Hoult" wrote in message
...
In article %N5Me.1542$yb.46@trndny01,
George Patterson wrote:

Because of this, the FAA requires that a pilot use oxygen if they
spend over 30 minutes above 12,500'.

My recollection of my O2 training is that the rule is 30 minutes over
10,000 ft, or if you go over 12,500 ft at *all*.


Is that cockpit pressure or actual altitude??

"Happy Dog" wrote in message
news
"T o d d P a t t i s t" wrote in message
"Ian Johnston" wrote:

That's a real feat. Without acclimatisation training, which, among other
things, increases hemoglobin counts, it's hard to stay usefully awake
after
a rapid ascent to that altitude. If you used an oximeter, I'd be
interested
in the readings. Did you notice any of the usual effects of hypoxia?

moo

I flew a glider to over 29,000 feet with an A-14 diluter demand system and a
pulse oximeter. It showed a solid 98% SpO2. I have flown to more than
38,000 feet with an A-14 and felt fine but I didn't have a oximeter.

The military systems like the A-14 are good to 38,000 feet according to the
manuals. Above that, a pressure demand system is needed like the US Navy A1
or the USAF A15 with matching pressure demand mask. The pressure demand
system is good to over 50,000 feet, again according to the manuals. The US
Navy A1 system manual specifically says normal SpO2 to 55,000.

Note that a pressure demand mask is very hard to breathe through below about
20,000 feet because of the effort to work the double check valves.

Bill Daniels

Bruce Hoult wrote:

My recollection of my O2 training is that the rule is 30 minutes over
10,000 ft, or if you go over 12,500 ft at *all*.

No. 12,500' if you exceed it for 30 minutes or 14,000' if you go over that at
all. At 15,000', passengers also have to be on oxygen. Section 91.211.

George Patterson
Give a person a fish and you feed him for a day; teach a person to
use the Internet and he won't bother you for weeks.

fred wrote:

In article %N5Me.1542$yb.46@trndny01,
George Patterson wrote:

Because of this, the FAA requires that a pilot use oxygen if they
spend over 30 minutes above 12,500'.

Is that cockpit pressure or actual altitude??

Cabin pressure altitude.

George Patterson
Give a person a fish and you feed him for a day; teach a person to
use the Internet and he won't bother you for weeks.

"Bruce Hoult" wrote in message
...
In article %N5Me.1542$yb.46@trndny01,
George Patterson wrote:

Because of this, the FAA requires that a pilot use oxygen if they
spend over 30 minutes above 12,500'.

My recollection of my O2 training is that the rule is 30 minutes over
10,000 ft, or if you go over 12,500 ft at *all*.

Better review the rules;

Mike
MU-2

On Tue, 16 Aug 2005 02:44:54 GMT, George Patterson
wrote:

Bruce Hoult wrote:

My recollection of my O2 training is that the rule is 30 minutes over
10,000 ft, or if you go over 12,500 ft at *all*.

No. 12,500' if you exceed it for 30 minutes or 14,000' if you go over that at
all. At 15,000', passengers also have to be on oxygen. Section 91.211.

This is all irrelevant if there is no oxygen in the system. That'd
be my guess. Too much trouble to check or refill. Tanks at the
airport are empty. Somebody sold them to a welder . . . .

Don

George Patterson wrote in
news:GqcMe.161$zb.155@trndny04:

Bruce Hoult wrote:

My recollection of my O2 training is that the rule is 30 minutes over
10,000 ft, or if you go over 12,500 ft at *all*.

No. 12,500' if you exceed it for 30 minutes or 14,000' if you go over
that at all. At 15,000', passengers also have to be on oxygen. Section
91.211.

George Patterson
Give a person a fish and you feed him for a day; teach a person
to use the Internet and he won't bother you for weeks.

Almost, but not quite correct.

91.211a(1,2) says "...flight crew is PROVIDED WITH AND USES (emphasis mine)
supplemental oxygen" at the 12,500 and 14,000 foot altitudes as you
correctly noted.

91.211a(3) says "...above 15,000 feet (MSL) unless each occupant is
PROVIDED WITH supplemental oxygen." Your passengers are never required to
be USING oxygen.

Yes, it's a minor point...
-Bob Korves

George Patterson wrote:
Bruce Hoult wrote:


My recollection of my O2 training is that the rule is 30 minutes over
10,000 ft, or if you go over 12,500 ft at *all*.


No. 12,500' if you exceed it for 30 minutes or 14,000' if you go over
that at all. At 15,000', passengers also have to be on oxygen. Section
91.211.

George Patterson
Give a person a fish and you feed him for a day; teach a person to
use the Internet and he won't bother you for weeks.

You should check Bruce's Lat/Long in his sig before you start quoting
him US FARs.

Shawn