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Thread: Smoke evacuation
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Old 1st November 2014 | 06:46
  #4 (permalink)  
grounded27
 
Joined: Sep 2010
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From: earth
As above stated this is called pre-pressurisation, set to clean the doors up, at this point the D/P on the cabin (even .5dpsi) would make just about impossible for a human to open a door.
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