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The FLAPS3 selection in the MCDU is just to allow the A/THR to command Vapp iso F-speed when the approach phase is activated".
I thought that the Flap selection in the MCDU would only change the VLs in the MCDU,and the A/THR would command the Vapp shown in the MCDU. If so, then my previous question may still hold since in step 4 we have manually inserted the Vapp.
Thanks