If yes then IE group is the best place for you. Pages Home About Contact. Normal system operating pressure is psi. Hydraulic fluid cannot be transferred from one system to an another. It is mainly used on ground for maintenance operations and cargo door operations. It transfers the hydraulic power but does not transfer the hydraulic fluid. They isolate the systems in case of an engine fire. The electric pump is an hydraulic system main pump.
It starts running at first engine start up. Blue and yellow pumps are fully interchangeable. The Ram Air Turbine is deployed automatically or manually.
It pressurizes the blue hyd. It can be retracted on ground only, following a specific maintenance procedure. Each hydraulic system has its own reservoir. The reservoirs are pressurized by bleed air to prevent cavitation. The normal source is engine 1, but if pressure becomes low bleed air is taken from the cross-bleed duct. The reservoirs are monitored for low fluid level, low air pressure and overheat.
The green and yellow systems are normally pressurized by engine driven hydraulic pumps. These pumps have a upstream shutoff valve that cuts off the flow of hydraulic fluid when the associated engine fire button is pushed.
The yellow hydraulic system may also be pressurized by an electric pump. This pump may be powered by either AC2 or external power. It operates automatically to partially pressurize the yellow system when the cargo doors are moved. After landing, for parking, the Parking Brake may be inoperative, hence parking brake should not be used and chocks should be in place before shutting down Engine 1. If there is a Lo Level in Yellow Hyd.
System in flight, will you get NWS after landing? The hand pump can be used to pressurize the Yellow system in order to operate the cargo doors when no electrical power is available. When will the Reservoir quantity symbol becomes Amber? Which ECAM caution will be generated? The reservoir overheat appears Amber when the temp. What is that? The difference is that in the former, the pump has overheated whereas in the latter, the hydraulic fluid temp.
What happens to it when N2 is below idle? Footnote: Tremendous efforts have gone into making this page. People involved with Project Airbus Tech PAT have spent countless sleepless nights to make this page possible for you. The least you can do is to support us by giving us our due credit. No part of this page may be copied, or distributed, or used for any commercial purposes. Thank you for supporting us, and thank you for giving us our due credit.
Peru-Pilot said:. March 11, at pm. Sushank Gupta said:. March 13, at pm. Xavi said:. July 17, at pm. July 18, at pm. Hari said:. January 10, at am. Sushank said:. August 1, at am. Hello Xavi, thanks for bringing this to notice. Read On! Regards Sushank. July 11, at pm. August 19, at pm. This is very helpful for me, permit to copy sir. I would like to answer in blue system, what is Emer. Raf said:. September 9, at pm. Gamble Tenpenny said:.
During the start sequence the PTU begins to operate for a short time. The PTU operates to restore pressure between the yellow and green systems. The Airbus A hydraulic system is comprised of three independent hydraulic systems: green, blue and yellow. Each system has a normal pressure of psi apart from when the blue system is powered by the RAT when it has a pressure of psi. Each of the three Airbus A hydraulic systems have a separate source of hydraulic power.
The blue hydraulic system is normally pressurized by the blue electric pump, but can be supplied the Ram Air Turbine RAT in an emergency. It is usually most noticeable during engine start. Aircraft Hydraulic Systems Explained in detail.
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