If V2 is not inserted, the speed reference system (SRS) will not engage for takeoff. 5 s after lift off, V/S mode will engage. When V/S engages the current airspeed becomes the FCU target speed. To regain a normal speed target, the pilot must : SELECT the appropriate climb speed on the FCU and PULL out the knob. At ACC ALT : PUSH the A/THR pb on the FCU. SET the thrust levers to CL detent. PUSH in the SPD selector knob to get a managed speed target.
L ' FCU di solito imposta di suo 100 di speed.
Poi come dice Giggey e' consigliabile settare la speed sull FCU a250 prima di effettuare la T/reduction perche' l' auto/T si attivera' e mantterra' quanto scritto sull' FCU.