28. HYD Panel Flashcards
Can the aircraft be flown with a loss of all hydraulic systems?
No – you must have at least one
What occurs when you press the RAT MAN ON pb?
The RAT extends providing pressure to the BLUE hydraulic system.
Does the PTU transfer hydraulic fluid?
No
How many hydraulic pumps are in the GREEN system?
o 1 Engine
o 1 PTU
How many hydraulic pumps are in the BLUE system?
o 1 Electric
o 1 RAT
How many hydraulic pumps are in the YELLOW system?
o 1 Engine
o 1 Electric
o 1 PTU
o 1 Hand pump
When does the BLUE ELEC PUMP operate?
o After the first engine is started
o If the BLUE PUMP OVRD pb on the MAINTENANCE panel has been pressed with no engine running
What is normal system hydraulic pressure?
3000 PSI
Does the RAT automatically deploy with the loss of BLUE pressure?
No, it must be deployed manually by the RAT MAN ON pb.
If the ACCU PRESS indicator is low, what should you do?
Obtain ground clearance, then turn ON the YELLOW ELEC PUMP to pressurize the accumulator.
When does the PTU operate with pb in AUTO?
o With a difference of 500 PSI between GREEN and YELLOW pressure
o Self‐test between first and second engine start
When is the PTU inhibited?
o PTU pb OFF
o First Engine start
o Parking brake is ON and only one ENG MASTER switch is ON
o NWS in towing position and parking brake ON
o Cargo door operation
What does a FAULT indication in the PTU pb mean?
Green or Yellow system:
Reservoir Fluid Low Level
Reservoir Overheat
Reservoir Low Air Pressure
If the ECAM actions lead you to turn OFF the PTU for a Reservoir Overheat, will the FAULT light go out
When the overheat condition no longer exists
Can the YELLOW ELEC PUMP run the PTU?
Yes, which will then pressurize the Green hydraulic system.