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PROF Descent Speed


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Its consistent.  I arm P.DES between 20-30nm prior to T/D, although ive done it earlier just to see if it makes a difference.  I believe it is related to any STAR that has a 280KT constraint.  It seems the aircraft will speed up to that prior to T/D when in actuality it should descend at the selected mach number and hold at the speed constraint once it reaches it in the descent.

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