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Old 21st June 2012 | 16:25
  #6 (permalink)  
cosmo kramer
 
Joined: Jul 2001
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From: East of West and North of South
If you didn't reach your top of descent, you have to press "Descent now" in the lower right corner of the FMC Descent page.

Pressing Altitude intervention has the same function as "Descent now" when still in cruise.
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