B-777 Hydraulics

  1. In the AUTO position, right demand pump runs continuously on the ground. (T or F)?
    TRUE
  2. The Ram Air Turbine (RAT) can provide Hydraulic pressure to the following:
    the center hydraulic system primary flight control components only
  3. The right hydraulic system pressurizes flight controls, ____.
    normal brakes, and the right thrust reverser
  4. There are ____ independent hydraulic systems on the B777.
    three (left, right, and center)
  5. Normal brakes are powered from the _________hydraulic system.
    the Right hydraulic system
  6. The left and right hydraulic systems are each powered by ____.
    engine driven and electric motor driven pumps
  7. The right hydraulic system demand pump is what type of pump?
    an electric powered pump
  8. The center hydraulic system demand pumps are __________ driven
    Air Driven
  9. The center hydraulic system demand pumps.........
    provide supplementary hydraulic power for periods of high system demand

    provide a backup power source for the electric primary pumps

    operate continuously on takeoff
  10. Normal brakes operate using the ____ hydraulic system(s).
    RIGHT
  11. Alternate brakes operate using the ____ hydraulic system(s).
    center
  12. All hydraulic system quantities and pressures can be viewed on ____.
    the hydraulic synoptic and status display
  13. Prior to engine start, pressurize the right hydraulic system first to prevent fluid transfer between systems.
    (T or F)?
    TRUE
  14. During engine shutdown, turn off the __________ pump last
    right demand pump
  15. If both of the center hydraulic system demand pumps are turned ON, .....
    only C1 demand pump operates
  16. In flight, the RAT deploys automatically if:
    Both engines are failed and center hydraulic system pressure is low.

    All 3 hydraulic system pressures are low.

    Both AC transfer busses are failed
  17. What conditions will cause the Ram Air Turbine (RAT) to automatically deploy?
    Both engines are failed and center hydraulic system pressure is low.

    Both AC transfer busses are unpowered.

    All three hydraulic system pressures are low.
  18. What occurs if both center hydraulic system demand pumps are turned to the ON position?
    Only the C1 demand pump operates.
  19. With the left and right hydraulic demand pump selectors in the AUTO position, when will both pumps operate?
    During takeoff.

    When system or primary pump pressure is low.

    During landing.
  20. With all hydraulic pumps selected to AUTO or ON, which center pump will load shed if only a single power source is available?
    C2 primary pump. 

    (The demand pumps are air driven...)
  21. Which of the following is the hydraulic function of the Ram Air Turbine (RAT)?
    Provides hydraulic power to the center hydraulic system (primary) flight controls only.
  22. The right hydraulic system powers the following:
    flight controls. 

    normal brakes. 

    the right thrust reverser.
  23. What components are powered by the center hydraulic system?
    Flight controls and Flap/Slats.

    Alternate/reverse brakes.

    Landing gear actuation. 

    Nose/Main gear steering
  24. Where are hydraulic system pressure and quantity indications displayed?
    The Status and Hydraulic Synoptic pages.
  25. What components are powered by the left hydraulic system?
    Flight controls and

    the left engine thrust reverser.
  26. What is the hydraulic function of the Ram Air Turbine (RAT)?
    Provides hydraulic power to the center hydraulic system FLIGHT CONTROLS ONLY
  27. What does the green PRESS   light in the RAT switch indicate?
    The RAT is deployed and center system primary flight control hydraulic pressure IS available
  28. These conditions will cause the RAT to automatically deploy (there are three):
    Both engines fail and the center hydraulic system pressure is low.

    All three hydraulic system pressures are low.

    AC transfer busses are unpowered or failed.
Author
david130
ID
348667
Card Set
B-777 Hydraulics
Description
Systems review
Updated