Re: Emergency exits capacity

From: (Brian A. Reynolds)
Organization: Rockwell Avionics - Collins
Date:         12 Sep 95 20:18:53 
References:   1
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re Evacuation time FAR 25.803 Emergancy Evacuation

(c)  For ailplanes having a seating capacity of more than 44 passengers,
it must be shown that the maximum seating capacity, including the number
of crewmembers required by the operating rules for which certification is
requested, can be evacuated from the airplane to the ground under simulated
emergancy conditions within 90 seconds.  Compliance with thie requirement
must be shown by actual demonstration using the test criteria outlined in
Appendix J...

Appendix J

(a)  The emergancy evacuation must be conducted either during the dark of
the night or during daylight with the dark of night simulated.

(f) Each external door and exit, and internal door or curtain, must be in
the takeoff configuration.

(h)(1) At least 40% must be female

(h)(2) At least 35% must be over 50

(h)(3) At least 15% must be female over 50

(h)(4) Three life-size dolls, must be carried to simulate live infants 2
years or younger

(k) Before the start of the demonstration, approximately one-hald of the
total average amount of carry-on baggage, blankets, pillows, and other
simular articles must be distributed at several locations in aisles and
emergancy exit access ways to create minor obstructions.

(p) Not more than 50 percent ofthe embergancy exits in the sides of the
fuselage of an airplane that meets all of the requirements applicable to
required emergancy exits for that airplane may be used for the
demonstration.  Exits that are not to be used in the demonstration must
have the exit handle deactivated or must be indicated by red lights, red
tape, or other acceptable means placed outside the exit to indicate fire
or other reason why they are unusable.  The exits to be used must be
representative of all of the emergancy exits on the airplane.

(s)  The evacuation time period is completed when the last occupant has
evacuated the airplane and is on the ground.

This is typically a demonstration which results in injuries.  During the
MD-11 program, on of the (h)(3) classification dove out the door, overshot
the ramp and broke her neck.  Friction burns and broken arms are also
typical injuries (as they are during actual emergancy conditions).  In
the UK a test was done where the passengers were paid for each item of
carry on they managed to take out with them.  The demonstration was VERY
realistic in that it turned violent as passengers fought to get out with
their 'stuff.'

Hope this answeres your questions.