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Thread: B747-400 VNAV PTH Descent Speed
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Old 3rd Aug 2015, 21:03
  #15 (permalink)  
AtoBsafely
 
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Usually, you will see "DRAG REQUIRED" as you approach a speed+altitude constraint. Usually the FMC default 240/10000. At this point, VNAV says it needs drag to achieve the approaching constraint.
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