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Old 17th August 2025 | 11:03
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k.swiss
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From: Winterthur
[Airbus] Managed Descent Logic
Good Afternoon,

The following has been answered in some sort but many years ago (decades) probably with different FMGS software version. Can someone help me with the following:
  1. During descent in MANAGED mode (THR DES+DES) if the speed is then SELECTED (SPD+DES) will the constraints be respected by the vertical guidance? For example 12,000FT by XX waypoint.
  2. Same scenario, but now the constraint is 200KTS/12,000FT will the constraint be respected with enough time to slow down if the speed is SELECTED? (How do you know when to slow down?)
TIA.
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