747-400 Hydraulic Set Up
Thread Starter
Joined: Jul 2002
Posts: 23
Likes: 0
From: taiwan
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.
1. sitting on the bay
2. pre-start
3. after start.
Many thanks ahead of time.
Joined: May 2002
Posts: 2,242
Likes: 0
From: Australia
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.
I'll move this over to Tech Log where I am sure you will get some useful information.
BlueEagle Moderator.
Last edited by BlueEagle; 8th August 2002 at 10:24.
Joined: Feb 2000
Posts: 1,993
Likes: 512
From: UK
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...
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...
