Re: B 737-500 Depressurization Incident

Date:         17 Mar 99 01:25:00 
From:         Seth Dillon <bdillon1@mindspring.com>
Organization: MindSpring Enterprises
References:   1 2
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JF Mezei wrote:
> Is it an urban myth that oxygen masks automatically deploy ?  How come they
> required manual intervention to be deployed when just about every safety
> briefing to pax mention "will automatically deploy in the unlikely event of a
> de-pressurisation" ? ?

There is an aneroid switch that drops the masks automatically at 14,000
ft (give or take a few) on all pressurized civil aircraft certified
under the FAR's  There is also a manually mask deploy switch.

-Seth