747-8i config creates HYD Aux 1 in 747-400

[Calvin212]

Hi!

Till today I only had one Hyd Aux system (HYD 4) in the 747-400. If I use a fixed aircraft config for the 747-8i (and this is obviously also used for the 747-400) this produces a second Hyd Aux System (HYD 1) in the 747-400. Are there any variants of the 747-400 with 2 Hyd Aux systems?

Thanks

Oliver

[thibodba57]

15 minutes ago, Calvin212 said:

Hi!

Till today I only had one Hyd Aux system (HYD 4) in the 747-400. If I use a fixed aircraft config for the 747-8i (and this is obviously also used for the 747-400) this produces a second Hyd Aux System (HYD 1) in the 747-400. Are there any variants of the 747-400 with 2 Hyd Aux systems?

Thanks

Oliver

Yes its a common modification.  If you don't want it, disable it as an option in the CDU.

[Calvin212]

argh, I didn't see the option cycling through the options for the first time...

[Calvin212]

11 minutes ago, thibodba57 said:

Yes its a common modification.  If you don't want it, disable it as an option in the CDU.

thanks