FlyerTalk Forums - View Single Post - Strange "valve-like" sound on 747 before landing
Old Aug 23, 2011 | 7:17 am
  #15  
BApilotinsider
 
Join Date: Jul 2011
Posts: 1,663
Originally Posted by cornishsimon
^
Thank you for taking the time out of your own personal life to post

cs
It's all part of the service....


Originally Posted by BicesterTerrier
Taking this marginally off topic, but at what point do the cabins get pressurised/depressurised? And is it in one go, or are there levels......
It is automatically controlled and changes according to the rate of ascent/descent. It does it gradually.

Last edited by BApilotinsider; Aug 23, 2011 at 7:27 am
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