B747 Oral Questions - 13) Hydraulics

  1. What does the hydraulic system (SYS FAULT) fault light indicate?
    • Low hyd system pressure
    • Low hyd reservoir quantity
    • High fluid temperature
  2. What does a hydraulic demand pump low PRESS light indicate?
    • Demend pump selector positioned to OFF or AUX
    • Demand pump operates and output pressure is low
  3. When will the demand pumps be commanded to operate if the hydraulic demand pump selector is in the AUTO position?
    • Demand pumps operate when related engine pump output is low, or when related fuel control switch is in CUTOFF
    • Demand pumps 1 & 4 also operate when flaps are in transit on the ground, or flaps extended past flaps 1 in flight
  4. Which Demand pumps are air driven, and which ones are electric motor driven?
    • System 1 & 4 are Air driven
    • System 2 & 3 are electric driven pumps
  5. What does a magenta "RF" displayed next to a hydraulic quantity indicator on the secondary EICAS mean?
    The reservoir requires refill (only displays on ground)
  6. What is the purpose of the auxiliary pump?
    Used for ground handling operations
  7. When is the engine driven hydraulic pump pressurized?
    • The engine is running
    • The engine pump switch is ON
  8. What does a hydraulic reservoir quantity indication of 0.95 mean, as displayed on the Secondary EICAS display?
    95% of normal service level
  9. What degraded or inoperative systems can you expect from a loss of hydraulic system 1?
    • Center autopilot
    • Left outboard elevator
    • Inboard trailing edge flap hydraulic operation
    • Nose and body gear hydraulic extension and retraction
    • Nose and body gear steering
    • Sys 1 alternate brake source
  10. What degraded or inoperative systems can you expect from a loss of hydraulic system 4?
    • Right outboard elevator
    • Outboard trailing edge flap hydraulic operation
    • 2 Inboard spoiler panels on each wing
    • Wing gear hydraulic extension and retraction
    • Sys 4 normal brake source
    • Autobrake
Author
Birddog370
ID
344933
Card Set
B747 Oral Questions - 13) Hydraulics
Description
B747 Oral Questions - 13) Hydraulics
Updated