Hydraulics Flashcards
Which systems provide hydraulic power to the stabiliser trim?
Left and center
Which system provides hydraulic power to the nose wheel steering?
Center
Which system provides hydraulic power to the tailskid ?
Center
Which system provides hydraulic power to the flaps?
Center
Which system provides hydraulic power to the landing gear?
Center
Which system provides hydraulic power to the normal brakes?
Right
Which system provides hydraulic power to the left reverser?
Left
Which system provides hydraulic power to the rudder ratio changer?
Left
Which system provides hydraulic power to the right reverser?
Right
Which system provides hydraulic power to the alternate brakes?
Center
Which system provides hydraulic power to the hydraulic driven?
Center
Which system provides hydraulic power to the main deck cargo door?
Left
Which system provides hydraulic power to the yaw damper?
Left and center
Which system provides hydraulic power to the pitch enhancement system (PES) ?
Right
Which system provides hydraulic power to the slats?
Center
What is a normal service quantity of hydraulic fluid (per reservoir)?
1.00
How are the hydraulic reservoirs pressurized? How many PSI?
By the bleed air system. 40 PSI.
How is operated the primary left and right hydraulic systems pumps?
Engine-driven pump.
How are operated the left and right hydraulic systems demand pumps?
Electric motor-driven pump.
Why are the electric demand pumps inhibited on the ground during engine start?
For load shedding (when only one electrical generator is operating).
For what systems does the center hydraulic reservoir maintain reserve fluid?
A standpipe traps a reserve quantity for the brakes and steering in the event of a center system hydraulic leak.
How are operated the center primary hydraulic pumps?
Electric motor-driven pumps (2).
How is operated the center hydraulic system demand pump?
Air-driven pump.
What happens to the gear and flaps when the air-driven demain pump is inoperative?
The gear retraction and flaps extension/retraction times will be increased.
When will the hydraulic driven generator be automatically powered by the center hydraulic system?
When electrical power is lost from both main AC busses.
To which system does the RAT provide hydraulic power when deployed?
To the flight controls portion of the center hydraulic system.
How is the RAT deployed when both engines fail?
Automatically.
Above what speed does the RAT provide adequate hydraulic power?
130kts
Can the RAT be stowed in flight ?
No.
What is the pressure of the hydraulic systems?
3 000PSI
How are the hydraulic fluids cooled?
Through heat exchangers located in the fuel tanks.
Below which quantity will the low quantity light illuminate?
0.48
What does the reserve brakes and steering switch do when positioned ON?
Provides pressure to alternate brake system and nose wheel steering system.
