We shall see in the course of time.
If the mode with the right F/D on was VS then unless the PF had disconnected the A/T it would have maintained thrust to keep the selected speed of 137 with SPD annunciated. ( unless the rate of descent made it impossible for the Aircraft to slow down )
It should have stopped it from going below 137 kts when later on he pulled the nose up.
If he disconnected the A/T the right F/D would have kept VS -1500 but without SPD mode. I would have thought in this case the A/T would wake up if the speed got low when he pulled the nose up??
Last edited by nitpicker330; 10th Jul 2013 at 13:08.