How does the mechanical backup on the 320 work? + some questions
I keep confusing myself, I apologize for the stupid quetions.
Firstly, if you lose both engines, your only source of hydraulics is the blue electric pump. The RAT is supplying the electric for that, is this correct? (Assuming APU is inop.)
What if the RAT for some reason fails, you've got no hydraulic supply.
Then what?
Now if you only lose your engine generators, you've got no electricity, but the hydraulics are working. In this case if you had the APU, it would supply the electric supply to be able to work the hydraulics correct?
If the APU was inop, but the RAT was working, you'd still have your blue electric pump.
How do you get into the mechanical backup?
No engine generators, no apu, and no RAT?
How will the hydraulics work in this case?
Sorry for so many questions.
I would appreciate some help, thanks all!