Hydraulic System

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Author:
Anonymous
ID:
176391
Filename:
Hydraulic System
Updated:
2012-10-08 22:38:57
Tags:
45 Hydraulic System
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Description:
Hydraulic System
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  1. When does the pressure relief valve open in PSP?
    3600 psi
  2. Normal Hydraulic Pressure
    3000 psi
  3. Normal RAT operating range
    2500-3000 psi
  4. Pressure reserved by wheel brake/emergency flap accumulator if HYD 1 loses pressure
    2200 psi
  5. Pressure at which HYD 2 PRESS caution light extinguishes
    2000 psi
  6. Pressure required to close HYD 2 bypass valve and retract RAT if deployed
    1800 psi
  7. Pressure at which HYD 2 PRESS caution light illuminates
    1660 +/- 110 psi
  8. Pressure at which RAT deploys
    1500 +/- 100 psi
  9. Pressure at which priority valve in PSP reopens to provide power for general services
    1500 +/- 100 psi (1500 psi)
  10. Pressure at which priority valve in PSP closes to isolate flight controls from general services
    1500+/- 100 psi (1600 psi)
  11. Required nitrogen preload pressure for wheel brake / emergency flap accumulator
    1300 +/- 50 psi
  12. Pressure at which HYD 1 PRESS caution extinguishes
    2000 psi
  13. Pressure at which HYD 1 PRESS caution illuminates
    1660 +/- 110 psi
  14. N2 RPM required to use HYD 2 RESET button
    45%
  15. N2 RPM below which HYD 2 bypass valve is energized open to reduce engine loads on start
    42%
  16. Number of full brake applications provided by brake/emergency flap accumulator
    10
  17. Requirements for HYD FAIL Warning
    • 1) HYD 1 Pressure below 1660 +/- 110 psi
    • 2) HYD 2 Pressure below 1660 +/- 110 psi
    • 3) Emergency system pressure less than 600 +/- 50 psi
  18. Devices in general services category
    (8)
    • 1) Flaps
    • 2) Slats
    • 3) Speed Brakes
    • 4) Landing Gear
    • 5) NWS
    • 6) Arresting Hook
    • 7) Launch Bar
    • 8) Wheel Brakes
  19. _________ ensure adequate base pressure to resist pump cavitation under all flight conditions
    Nitrogen pressurized resevoirs
  20. The power supply package (PSP) consists of 
    (3)
    Check valves, pressure relief valve, priority valve
  21. When does the WHEELS warning light illuminate?
     When LDG GEAR handle is not set to DN, N2 < 95% and

    1) Altitude less than 7200' MSL and airspeed less than 170 knots

    or

    2) FLAPS/SLATS lever not in up position
  22. What does HYD 1 supply hyd power to?
    General services and flight controls
  23. What does HYD 2 supply hyd power to?
    Flight controls
  24. If HYD 2 and RAT fail, what effect on total HYD System?
    None. HYD 1 still operating everything normally.
  25. If HYD 2 is leaking, will RAT do the job?
    No
  26. Brake accumulator gauge is reading what?
    Nitrogen pressure
  27. Flight control accumulators have precharge of what?
    1100 +/- 50 psi
  28. Hand pump up to what psi?
    2800 psi
  29. HYD 1 EDP constant output
    • 3000 psi
    • 9.6 g/min

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