ATA 29 - Hydraulic

Question 1

Description of the hydraulic system

Answer 1

Cf diagram

Question 2

Normal hydraulic pressure ?

Answer 2

3000 psi +/-200psi

Question 3

Hydraulic pressure when RAT out on blue circuit ?

Answer 3

2500 psi

Question 4

HYD ENG pump OFF: no pressure delivered but pump still running. True or false ?

Answer 4

True

Question 5

Capacity blue hydraulic reservoir ?

Answer 5

6,5 L

Question 6

Capacity green hydraulic reservoir ?

Answer 6

14,5L

Question 7

Capacity yellow hydraulic reservoir ?

Answer 7

12,5L

Question 8

Systems powered by green hydraulic ?

Answer 8

Landing gear
Slats / flaps
Rev 1
Normal brake /autobrake
FCTL

Question 9

Systems powered by blue hydraulic ?

Answer 9

Emer gen
Slats
FCTL

Question 10

Systems powered by yellow hydraulic ?

Answer 10

Flaps
Rev 2
Alter/parking brake
Cargo door
FCTL

Question 11

Causes of FAULT hydraulic engine pump ?

Answer 11

Low hydraulic quantity
Low hydraulic pressure (inhibited on ground, engine off)
Low air pressure
Overheat reservoir

Question 12

Yellow electrical pump provides pressure to which systems ?

Answer 12

Cargo door
Rev 2
Alt/prk brake

Question 13

When blue electrical pump activates ?

Answer 13

On ground, 1or 2 engines running
Inflight

Question 14

PTU AUTO: delta pressure to activate ?

Answer 14

500psi

Question 15

PTU is inhibited when 1 engine running and bypass pin or parkbrake. True or False ?

Answer 15

True

Question 16

RAT deploys automatically if hydraulic failure . True or False ?

Answer 16

False. You need RAT MAN ON to provide hydraulic (but no elec)

Question 17

Hydraulic pressure figure amber on ECAM page ?

Answer 17

1450 psi

Question 18

Where comes from air to pressurize hydraulic reservoir ?

Answer 18

ENG1 HP
(XBleed if not available )
Cf diagram

Question 19

When the PRIORITY VALVES operate ?

Answer 19

Low hydraulic pressure. Cut off big users.

Question 20

During first ENGINE START the PTU is active or inhibited ?

Answer 20

Inhibited

Question 21

The YELLOW SYSTEM includes operation of left or right elevator ?

Answer 21

Right elevator

Question 22

On ground when is the BLUE SYSTEM pressurized ?

Answer 22

One engine running

Question 23

On newer aircraft, with Yellow System lost, is NSW lost ?

Answer 23

Yes. On old aircraft NWS is on green circuit

Question 24

The GREEN SYSTEM operates which ailerons ?

Answer 24

Both.
BG —————-GB

Question 25

Which spoilers are actuated by which hydraulic circuit ?

Answer 25

1___2___3___4___5 G. Y. B. Y. G

Question 26

Which ailerons is operated by Blue circuit ?

Answer 26

Both BG ____GB

Question 27

Which elevator is operated by green circuit ?

Answer 27

Left elevator

Question 28

YELLOW ELEC PUMP OFF. Ground crew select cargo door lever manually on OPEN or CLOSE. Is yellow circuit pressurized ?

Answer 28

Yes. It comes on automatically when a crewman sets the lever of the cargo door manual selector valve to OPEN or CLOSE. PTU and flight controls are inhibited as usual.

Question 29

Which systems are cut off by the hydraulic priority valve ?

Answer 29

Green: Landing gear and slats/flaps Blue: Emer gen and slats Yellow: flaps