Re: 747 question

From: (Sense)
Organization: America Online, Inc. (1-800-827-6364)
Date:         17 Mar 95 12:58:01 
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  or MIME structure

I can reply to the emergency slide question.  Prior to take-off, the
captain will say something like "Flight Attendents prepare for departure",
and then they will position the actuating arm that attaches to the door. 
This arm actuates the slide upon opening the door.  Naturally, before
landing the captain will say "....prepare for arrival." and that tells the
attendant to disable the actuator.

In short, the slides can only be activated from inside the plane.