A320 NWS problem
Thread Starter
Joined: May 2007
Posts: 14
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From: CANADA
A320 NWS problem
Hi all,
As you airbus drivers know, A320's nose wheel steering is operated
by Green Hydraulic system..
But, what happens if you lose Green system?
Does Yellow system takes over and then you still can use NWS ???
Thx
As you airbus drivers know, A320's nose wheel steering is operated
by Green Hydraulic system..
But, what happens if you lose Green system?
Does Yellow system takes over and then you still can use NWS ???
Thx
New ones seem to use the Yellow, for reasons best known to Airbus 
Joined: Jun 2005
Posts: 244
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From: Here There Yonder
NWS/Green/Yellow Syst.
Dream Land. Perhaps to taxi off after landing and after having had a green syst hyd failure.
SRover40. In the begining and also upto just a few years ago, the NWS was on the Green system and the pressure was tapped off the nose landing gear door closing circuit. In the event of a manual gear extension, the nose gear door remain open and thus isolating the NWS. So even if you still have green hyd qty one could not use the yellow + PTU to provide NWS.
Airbus have since moved the NWS system from the green hyd syst to the yellow syst. The NWS now has two sources of hydraulic power....No2 engine driven pump and the yellow hydraulic pump.
Not that I much like the idea, but you can, should you so desire, taxi on one engine and have NWS.
I hope this helps.
Ndicho Moja.
SRover40. In the begining and also upto just a few years ago, the NWS was on the Green system and the pressure was tapped off the nose landing gear door closing circuit. In the event of a manual gear extension, the nose gear door remain open and thus isolating the NWS. So even if you still have green hyd qty one could not use the yellow + PTU to provide NWS.
Airbus have since moved the NWS system from the green hyd syst to the yellow syst. The NWS now has two sources of hydraulic power....No2 engine driven pump and the yellow hydraulic pump.
Not that I much like the idea, but you can, should you so desire, taxi on one engine and have NWS.
I hope this helps.
Ndicho Moja.
Joined: Jun 2005
Posts: 244
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From: Here There Yonder
Disagree by all means, isn't that what this forum is all about.
If on the other hand the NWS is on another hydraulic system then no need for tow tractor. Just as the brakes have another supply.
You are correct. If the NWS is on the green syst only, then without doubt call for the tow tractor.
If on the other hand the NWS is on another hydraulic system then no need for tow tractor. Just as the brakes have another supply.
You are correct. If the NWS is on the green syst only, then without doubt call for the tow tractor.
Joined: Jun 2005
Posts: 174
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From: Citizen of the World
As stated, newest 320s have the NWS moved to the Yellow system A very good idea to separate the power sources for the landing gear and NWS. At the same time they also changed the limit pressure of 1000 psi when on emergency braking to be totally automatic. You can now floor the brakes and the pressure is automatically limited to 1000 psi. Why didn't they think of it before!
Joined: Jul 2000
Posts: 91
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From: Germany
@ preppy
That's why I think the MMEL isn't worth the paper it's printed on. It's unbelievable, in which conditions AI let's you dispatch...
Fortunately my Company takes a different view on a couple of important items. And no, we do NOT go without NWS.
Good Luck, MAX
That's why I think the MMEL isn't worth the paper it's printed on. It's unbelievable, in which conditions AI let's you dispatch...
Fortunately my Company takes a different view on a couple of important items. And no, we do NOT go without NWS.
Good Luck, MAX
