The airplane has three hydraulic systems: A, B and standby. The standby system is used if system A and/or B pressure is lost. The hydraulic
systems power the following airplane systems:
Hydraulic System SGR
System A Using Units

  • Ailerons
  • Rudder
  • Elevator and Elevator Feel
  • Flight Spoilers
(Two on each wing)
  • Alternate Brakes
  • Number 1 Thrust Reverser
  • Autopilot A
  • Normal Nosewheel Steering
  • Landing Gear
  • Power Transfer Unit (PTU)
System B Using Units

  • Ailerons
  • Rudder
  • Elevator and Elevator Feel
  • Flight Spoilers
(Two on each wing)
  • Leading Edge Flaps and Slats
  • Normal Brakes
  • Number 2 Thrust Reverser
  • Autopilot B
  • Alternate Nosewheel Steering
  • Landing Gear Transfer Unit
  • Autoslats
  • Yaw Damper
  • Trailing Edge Flaps
  • Wheel brakes
  • Nose wheel steering
  • Thrust reversers
  • Autopilots.
  • Flight controls
  • Leading edge flaps and slats
  • Trailing edge flaps
  • Landing gear
Either A or B hydraulic system can power all primary flight controls with no decrease in airplane controllability.