A320 Hyd B+Y fail
A320 question gents.
Dual hydraulic failures G+B and G+Y dominance is so much that the B+Y has taken the back seat. Even Airbus isn't helpful.
1. With G+Y fail you are in Alt law, loose flaps and needs adding of 25kts to Vref
2. With G+B fail you are in Alt law, loose slats and half elevator and needs addition of 25kts to Vref
3. With B+Y fail you remain in normal law can extend both slats and flaps but loose half elevator.
And yet the FCOM says (B+Y) if Flap3 Vapp Vref+25. It's silent on flaps full.
If you go to QRH Inflight Performance landing distance chart(now removed) it offers both options in flaps full with zero ∆Vref and Flap3 with only 6kts ∆Vref.
Doesn't make any sense to me. Has anyone got an answer from techrequest?
Last edited by vilas; 20th Mar 2023 at 05:00.