A320 Hyd G + Y SYS LO PR
Thread Starter
Join Date: Nov 2006
Location: Tropics
Posts: 359
Likes: 0
Received 0 Likes
on
0 Posts
A320 Hyd G + Y SYS LO PR
Hi all,
Just a quick question, I noticed that on the A320 if you lose both green and yellow hydraulic systems, the procedure does not call for the selection of the yellow electrical driven pump. I can't find any explanations as to why we can't use the yellow electrical pump if we have electrical supply?
What happens if I turn on the yellow electrical pump? Is the pressure sufficient and will the PTU power the green hydraulic system? And we can possibly have some flaps?
Thanks for any suggestions. Still learning very much on the A320.
Just a quick question, I noticed that on the A320 if you lose both green and yellow hydraulic systems, the procedure does not call for the selection of the yellow electrical driven pump. I can't find any explanations as to why we can't use the yellow electrical pump if we have electrical supply?
What happens if I turn on the yellow electrical pump? Is the pressure sufficient and will the PTU power the green hydraulic system? And we can possibly have some flaps?
Thanks for any suggestions. Still learning very much on the A320.
Join Date: Dec 2008
Location: uk
Posts: 913
Likes: 0
Received 0 Likes
on
0 Posts
Just an added thought,
the Yellow Electric Pump is primarily used to raise and lower the hold doors when the EDP's are off.
As such, it is auxiliary to the main functions of the Yellow EDP systems and may Overheat if used for long periods.
This is alluded to, but not expanded on, in the HYD Y ELEC PUMP LO PR or OVHT ecam procedure.
In addition, I have had several instances where the Yellow Elec Pump has stuck on after the Loaders have opened the Hold Doors, unless noticed on the SD page, this invariably ends up with an ECAM Caution for pump ovht.
Lastly, the a330 has an additional electric pump which activates during Gear Up. This remains on during the EFATO procedure and also overheats unless manually switched off.
Better than nowt, but I wouldn't rely on it!
the Yellow Electric Pump is primarily used to raise and lower the hold doors when the EDP's are off.
As such, it is auxiliary to the main functions of the Yellow EDP systems and may Overheat if used for long periods.
This is alluded to, but not expanded on, in the HYD Y ELEC PUMP LO PR or OVHT ecam procedure.
In addition, I have had several instances where the Yellow Elec Pump has stuck on after the Loaders have opened the Hold Doors, unless noticed on the SD page, this invariably ends up with an ECAM Caution for pump ovht.
Lastly, the a330 has an additional electric pump which activates during Gear Up. This remains on during the EFATO procedure and also overheats unless manually switched off.
Better than nowt, but I wouldn't rely on it!
Join Date: Mar 2005
Location: Uh... Where was I?
Posts: 1,338
Likes: 0
Received 0 Likes
on
0 Posts
One thing is a lost pump and quite another thing is a lost hydraulic system.
If a system is lost, it is lost, no matter how many pumps you have. Actually, you have to switch them all, including the PTU if any. isolating the system and thus preventing it from creating more problems, means that we lose the system.
If only the y eng pump is lost we can use the Y elec, if we were so unlucky that we lost the PTU, too. otherwise it is better to let the PTU do its job.
If a system is lost, it is lost, no matter how many pumps you have. Actually, you have to switch them all, including the PTU if any. isolating the system and thus preventing it from creating more problems, means that we lose the system.
If only the y eng pump is lost we can use the Y elec, if we were so unlucky that we lost the PTU, too. otherwise it is better to let the PTU do its job.
