Hydraulic

Question 1

Normal system operating pressure is

Answer 1

3 000 PSI (2 500 PSI when powered by the RAT)

Question 2

A pump driven by engine 1 pressurizes the

Answer 2

green system

Question 3

An electric pump pressurizes the _____ system. A pump driven by a ram air turbine (RAT) pressurizes this system in an emergency.

Answer 3

blue

Question 4

A pump driven by engine 2 pressurizes the _____ system. An electric pump can also pressurize the _____ system, which allows ______ hydraulics to be used on the ground when the engines are stopped.

Answer 4

yellow / yellow / yellow

Question 5

The power transfer unit comes into action automatically when the differential pressure between the green and the yellow systems is greater than

Answer 5

500 PSI.

Question 6

A drop-out RAT coupled to a hydraulic pump allows the blue system to function if

Answer 6

electrical power is lost or both engines fail. The RAT deploys automatically if AC BUS 1 and AC BUS 2 are both lost

Question 7

If the bleed air pressure is too low, the system takes bleed air pressure from the

Answer 7

crossbleed duct.

Question 8

Blue electrical pump

FAULT lt : This amber light comes on, and a caution appears on the ECAM, if :

Answer 8

‐ The reservoir level is low ‐ The reservoir overheats ‐ The air pressure in the reservoir is low ‐ The pump is delivering low pressure (inhibited on the ground, when the engines are stopped) ‐ The pump overheats.

Question 9

Yellow electrical pump
OFF
This inhibits the operation of other yellow system functions (except

Answer 9

alternate braking and engine 2 reverse).

Question 10

The PTU is inhibited during the

Answer 10

first engine start and automatically tested during the second engine start.

Question 11

ECAM Reservoir quantity It is in green, unless the fluid level goes below the

Answer 11

warning level, in which case it becomes amber.