Talk:Emergency oxygen system

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Is the gas fed through the mask pure Oxygen or compressed air? I ask because, as a scuba diver, I get very frustrated when non divers refer to the gas normally used in sport diving as "Oxygen" when it is in fact compressed air. Mickmct (talk) 12:12, 29 August 2008 (UTC)

It's pure oxygen. There are holes in the masks designed to allow external air to be mixed with the oxygen supplied by the system.

Most commercial aircraft are pressurized at a maximum cabin altitude of 8,000 feet, where it is possible to breathe normally without an oxygen mask. If the cabin altitude reaches 14,000 feet or higher, or a decompression occurs and hypoxia is possible, [...]

Shouldn't there be kilometers instead of feet? —Preceding unsigned comment added by Jędrzej Pełka (talkcontribs) 09:54, 11 May 2010 (UTC)

Altitude in aviation is measured in feet.

Disputed: MD-80 oxygen masks location[edit]

I have been flying on MD-80 planes and the location of the masks is the usual place - overhead. This is further collaborated by this youtube video: I wonder why it is mentioned in this article that their location in the MD-80 is on the compartment door - perhaps on the very early versions of the aircraft? unsigned comment added by Lonwolve (talkcontribs) 13:09, 14 March 2011 (UTC)

It's saying that when the compartment opens, the masks are clipped to the inside of the door and must be removed, as opposed to freely dropping and hanging by the tube, once they are pulled off the door and activated they operate the same as any other aircraft.


Thanks!Lonwolve (talk) 16:04, 25 March 2011 (UTC)

Disputed Section: Usage History[edit]

The source cited for much of the information in this section ( is a Usenet archive containing comments and questions from several different individuals. I do not believe that is meets the criteria for a "reliable source" here.

Also, some of the wording in this section is misleading. In the second paragraph, the sentence begins with the phrase: "In the three cases of in-flight explosive decompression studied,...". When I reviewed the source from which this information was derived (, what I found was the following paragraph that was part of a question posted to the forum:

"I know of at least three explosive decompressions where most of the passengers survived: the DC-10 where the cargo door blew out over Canada, the Aloha Air 737 where the top of the forward fuselage came off, and the 747 that lost a cargo door over the Pacific. Did oxygen systems help in any of these cases?"

The source says, "I know of at least three...", which this article says, "In the three cases of in-flight explosive decompression studied,...". This may give readers the false impression that there was some sort of formal study done based on these three cases, when in actuality the discussion of those three cases on the discussion board was simply because the person who asked the question was asking specifically about the three cases that he/she knew about.

Mhadj001 (talk) 21:15, 10 July 2011 (UTC)

Deleted section. Opinionated POV assertions made with no citations ("PDF" not a valid citation). Sounds like someone's personal essay. Before restoring section, please use only assertions that can be cited from outside, published, peer-reviewed sources, not some personal Website or blog. J M Rice (talk) 01:02, 19 March 2014 (UTC)

Not answered by article[edit]

How much O2 is on board? How long do the passengers have on this system? (talk) 10:17, 28 March 2014 (UTC)