Aircraft Hydraulic Systems

Question 1

What are the three hydraulic systems on board the aircraft

Answer 1

Green
blue
yellow

Question 2

Describe the green hydraulic system

Answer 2

Driven by two engine driven pumps, with an electrical and RAT as redundancy. Powers one of the actuators for the boom when lowering on ground. Monitored by the HSMU. operates at 3000psi

Question 3

describe the yellow hydraulic system

Answer 3

driven by one engine driven pump (engine 2). Has an electric pump for redundancy. Operates the cargo doors while on ground and can turn on automatically in the event of an engine 2 fault with flaps at position 0. Operates at 3000 psi.

Question 4

Describe blue hydraulic system

Answer 4

powered by engine 1 driven pump, has an electric pump as redundancy.

Question 5

Which hydraulic system powers the AAR pumps

Answer 5

the AAR pumps utilise pressure from all hydraulic systems

Question 6

which hydraulic systems power each fuel pump

Answer 6

Green - Powers 2, 3, 6
Yellow - Powers 5
Blue - Powers 1, 4

Question 7

What is the low pressure system within the hydraulic system

Answer 7

each hydraulic system has a hydraulic low pressure valve, which turns off pressure to non-essential components in the event the systems has a leak.