Alternate Flap System

Flaps are normally Extended and retracted using System B Hydraulics, however with a System B failure the flaps need to be operated using the Electrical Alternate System.

[@Realchina1989]

I think that if you want to retract the flap form 15 to up , it means that go around , so first of all push TOGA , then flap 1( using the alternate flap switch ) then normal procedure for go around .

[@hiflyer2270]

Can you extend flaps to 30 using Alternate

[@tomharper8402]

how come hyd qty A was lower then B by so much was it to do with the gear positistion,thought you needed 76% minimum in both QTY to depart ?

[@simcaptainb737tutorials9]

In order to create the failure, both hydraulic pumps are switched off to prevent the hydraulic flap system operating. It isn’t a perfect way to create the failure. But yes you are correct, to dispatch, you must not have an RF which is

[@tomharper8402]

@@simcaptainb737tutorials9 ok thanks a lot sorry I was half asleep when I watched the video wasn’t thinking smart but I’ve also heard that when the gear is down hyd QTY A drops as fluid moves from the reservoir into the landing gear ? Is that correct

[@robertmorgan9621]

@@tomharper8402 thanks for your comment. That’s not something that I have been made aware of. The SYS page isn’t normally up whilst flying so not something I would have noticed. Maybe the next time I fly, I could check it out.

[@tomharper8402]

@@robertmorgan9621 yeh no worries correct the lower DU should be blanked for better awareness in case of engine issues but it’s checked before departure or at least should be but the sim isn’t the most accurate as was mentioned

[@markcardwell]

Thx

[@gamerdeol2694]

Did you not set it to off instead of stdb rudder?

[@simcaptainb737tutorials9]

THE VIDEO IS TO DEMONSTRATE THE ALTERNATE SYSTEM. THE HYDRAULIC SYSTEM HAS BEEN FRIGGED TO PREVENT HYDRAULIC FLUID MOVING THE FLAPS SO IGNORE NORMAL SWITCH POSITIONS. IT WAS A WORK AROUND. 👍