Hydraulics

Question 1

How are the hydraulic demand pumps powered?

Answer 1

Demand 1 and 4 are pneumatically powered
Demand 2 and 3 are electrically powered

Question 2

What are the pumps in hydraulic system 4?

Answer 2

EDP
Aux Electric demand pump
Pneumatic demand pump

Question 3

When will the hydraulic system fault light illuminate?

Answer 3

• Low pressure,
• Low hydraulic reservoir quantity, or
• High fluid temperature.

Question 4

When will the hydraulic system Demand pump amber PRESS light illuminate?

Answer 4

• The selector is in the OFF or AUX position,
• The demand pump is operating but output pressure is low, or
• The demand pump has failed.

Question 5

When will the hydraulic system Engine Pump Pressure Light illuminate?

Answer 5

Engine Pump Output Pressure Low

Question 6

Is a hydraulic system lost if a engine fire switch is pulled?

Answer 6

No, the demand pump should take over

Question 7

What does a RSVR PRESS on the hydraulic synoptic page indicate?

Answer 7

Bleed air pressure is low

Question 8

What is HYQUIM?

Answer 8

Hydraulic Quantity Interface Module

Question 9

What is the normal Demand Pump Selector position after Engine Start?

Answer 9

Auto

Question 10

The hydraulic fluid Shutoff Valve closes when _________.

Answer 10

The related Engine Fire Switch is pulled

Question 11

If the engine Driven Pump Switch is turned Off the associated Pressure Light ______________.

Answer 11

Illuminates