Hydraulic System

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:

  • Flight controls
  • Leading edge flaps and slats
  • Trailing edge flaps
  • Landing gear

Either A or B hydraulic system can power all flight controls with no decrease in airplane
controllability.

Each hydraulic system has a fluid reservoir located in the main wheel well area.

System A and B reservoirs are pressurized by bleed air. The standby system reservoir is
connected to the system B reservoir for pressurization and servicing.

Pressurization of all reservoirs ensures positive fluid flow to all hydraulic pumps.
  • Wheel brakes
  • Nose wheel steering
  • Thrust reversers
  • Autopilots.