Hydraulics

Question 1

Digital HYD quantity read out range

Answer 1

0 to 106%

Question 2

Normal pressure HYD

Answer 2

3000PSI

Question 3

Max HYD pressure

Answer 3

3500PSI

Question 4

When does RF indication show and when does it appear on the MFD

Answer 4

When quantity drops below 76%

Shown when the a/c is on the ground with both engines shutdown or after landing with flaps up during taxi in

Question 5

When FLT CONTROL switch is placed to STBY RUDDER

Answer 5

Activates standby pump and opens standby rudder shutoff valve to pressurise the stanby rudder PCU

Question 6

amber LOW PRESSURE underneath FLT CONTROL switches

Answer 6

Low HYD system pressure to ailerons, elevator and rudder

Question 7

System A HYD system supplies

Answer 7

Ailerons, Rudder, Elevator, Elevator feel
Flight spoilers
Alternate brakes
L/d gear
Ground spoilers
L/d transfer unit
No1 thrust reverser
Nose wheel steering
A/p A
PTU

Question 8

System B HYD system supplies

Answer 8

Ailerons, Rudder, Elevator, Elevator feel
Slats and trailing edge flaps
Yaw damper
Brakes
Autoslats
No2 thrust reverser
Flight spoilers
Alternate nose wheel steering
A/p B
L/g transfer unit

Question 9

How much more does the Engine driven pump supply in volume than the electric driven pump

Answer 9

6 times

Question 10

Positioning the ENG driven pump to OFF

Answer 10

Isolates fluid flow from the system components
Activates a solenoid blocking valve

Continues to rotate as long as the engine is operating

Question 11

HYD fluid is also used for cooling and lubrication of the pumps. Where are the heat exchangers located

Answer 11

Passes through a heat exchanger before returning to the reservoir. System A located in main tank No1. System B = Main tank No2

Question 12

Min fuel for ground operation of electric driven HYD pump

Answer 12

760kgs in the related tank

Question 13

System A HYD leak un engine driven pump lines what will be displayed

Answer 13

Standpipe in the reservoir prevents total system loss. Quantity will indicate 20% full.
System A pressure is maintained by the electric pump

Question 14

System A HYD leak in electric driven pump and lines what will happen?

Answer 14

Quantity in reservoir slowly decreases to 0 and all system pressure is lost

Question 15

System B HYD leak in either pump or line what will happen

Answer 15

Quantity decreases until it indicates 0 amd pressure is lost

Standpipe fluid is sufficent to operate the PTU

Leak in system B does not effect the standby system

Question 16

When does the PTU operate

Answer 16

System B engine driven pump drops below limits
Airborne
flaps are less than 15 but not up (YA573 to YW097)
flaps are not up (everyone else)

Question 17

What system supplies the L/g gear transfer unit when system A engine driven volume is lost

Answer 17

System B if these conditions exist

Airborne
No1 engine RPM drops below limit value
L/d gear postitioned UP
Either main l/d gear is not up and locked

Question 18

What does the standby HYD system power

Answer 18

Rudder
Thrust reversers
LE flaps and slats (extend only)
Standby yaw damper

Question 19

Positioning the ALTERNATE FLAPS to ARM

Answer 19

Activates standby electric motor driven pump
Closes TE flap bypass valve
Arms ALTERNATE FLAPS switch
Allows standby system to power LE flaps and slats

Question 20

Automatic operation of Standby HYD is caused by what conditions

Answer 20

Loss of system A OR B
Flaps extended
Airborne
Wheel speed greater than 60kts
FLT CONTROL switch A or B ON

or

The main PCU force flight monitor trips

Question 21

Standby HYD system leak

Answer 21

Reservoir decreases to 0
LOW QUANTITY light illuminates when it is half empty
System B operates normally ut indication decreases and stabilises at 70% full

Question 22

Cavitation/foaming can occur at high altitudes what signs in the f/d if foaming has occured

Answer 22

Blinking of LOW PRESSURE lights and pressure fluctuations

MASTER CAUTION and HYD may illuminate momentarily