You beat me to it. I noticed in CEO the Vref flaps full is appx. = GW+70 while in Flap 3 it is Flaps Full+5kts. For example GW 60T+70=130kt with flaps full and for flaps3 it is 130+5=135kts. In the Neo Flaps full is GW+65 i.e. and60+65=125kts but Flap3 is Flaps full+10kts. i.e. 125+10=135kts. I can guess 5kts increase over Flap3. It is to prevent reduction in the tail clearance.
Last edited by vilas; 27th Jan 2020 at 08:19.