| Re: Article on JB's Incident - ATSB Prelim. Findings |
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Group: aus.aviation · Group Profile
Author: David LesherDavid Lesher Date: Sep 4, 2008 09:06
Snapper y7mail.com.invalid> writes:
>> Airspeed for the descent...well you have a couple of choices. Max speed
>> will get you down fastest, but has structural integrity issues. Current
>> speed will give you a pretty quick entry, but will be slower than a faster
>> speed, but with less structural risk. A speed reduction will delay the
>> descent start, but has the least structural risk.
>I s'pose that if the O2 masks are working then a slow descent shouldn't be an
>issue, right?
That assumes every px got a mask on ASAP. I think that's a bad assumption.
[Somewhere I read a report on what %% do, but it was years ago.]
If the FA's and/or other passengers do manage to get to 100%%, great. But
the flight crew is too busy to ask.
So there's the issue of "How long can a person make do without?" which
is a really fuzzy issue. [Note: not stay conscious, but not suffer
brain damage.i; asleep passengers not being a problem but dead ones
are.] If the aircraft is full of 20 YO Olympic athletes, you'll get a way
different answer than if it's the Port Hedland Smoking Society retiree
charter.
ps: An Alaska bush pilot I knew would describe being on O2 & his wife
would keep awake without, by playing her harmonica. Her increased
respiration was sufficient to keep her awake. [The US regulations require
flight crew O2 above 12,500 ft, but passengers can go to 15,000 without.]
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