Hydraulics

Question 1

How many hydraulic systems are there?

Answer 1

3 Systems (left, right and Aux)

Question 2

What does the Left system Power?

Answer 2

• The landing gear
• Nosewheel steering
• Inboard brakes
• Left thrust reverser
• Inboard elevator/rudder components

Question 3

What does the right system Power?

Answer 3

• The flaps
• Outboard brakes
• Right thrust reverser
• Outboard elevator/rudder components

Question 4

What does the Aux system power?

Answer 4

The lower rudder Power Control Unit (PCU) should the right hydraulic system fail

Question 5

What is the PTU’s function?

Answer 5

It allows the Right System to power the Left System specifically for landing gear operation if the left engine or EDP fails.