747-400 Hydraulic Set Up
 

I have a sim ride for an interview coming up (Not CX as the ban is on and there is no way I'm going to s**b) so could someone please let me know the set up of the hydraulic system in
1. sitting on the bay
2. pre-start
3. after start.

Many thanks ahead of time.

From my own experience on the -400 I know that different companies have very slight variations on the hydraulic set up at certain times.

I'll move this over to Tech Log where I am sure you will get some useful information.

BlueEagle Moderator.

Variations between companies depending on how many Aux pumps are fitted and requirements for electrical load minimising for engine start.
e.g. GE engines, 1 Aux pump on the No4 system, pre-start:1,2,3 ADPs to Auto, No4 Aux pump on; after-start: all ADPs to Auto.

GE engines, 2 Aux pumps, pre-start: 1 and 4 Aux pumps on, 2 and 3 ADPs to Auto; after-start: all ADPs to Auto.

RR engines, 2 Aux pumps, pre-start: 1 and 4 Aux pumps on, 2 and 3 ADPs OFF; after-start: All ADPs to Auto.

and so on...