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Spirit Airbus A320 Training > Hydraulics > Flashcards

Flashcards in Hydraulics Deck (20):
1

How many hydraulic system in the Airbus?

- 3 Independent systems, with own reservoir
- Green
- Blue
- Yellow

2

How do they hydraulic system prevent pump cavitation?

- Reservoirs are automatically pressurized by pneumatic system with HP air from ENG 1

3

Green hydraulic system runs off?

- Engine 1

4

Yellow hydraulic system runs off?

- Engine 2

5

Backup source for lower pressure in Green system?

- PTU (power transfer unite) Yellow system helps PTU us Green system

6

Yellow system has how many valves?

- 5 valves

7

What is the yellow system used for?

- Cargo doors
- Braking

8

What system has a backup electrical pump?

- Yellow system (can be controlled in cockpit)

9

If Yellow system fails how can you open cargo doors?

- Hand pump on side of fuselage

10

What is Blue system primary source of power?

- Electrical pump, comes on automatically when first engine starts.

11

What system does the RAT power?

- Blue system

12

Does amber indication on the PTU mean it has failed?

- No, it could just be tuned off

13

Will eclectic pump on yellow system pressurize the entire system?

- No, only pressurizes apportion of the yellow system.

14

When will pressure go to Amber?

- When pressure drops below 1450 PSI

15

Will the RAT deploy if 2 hydraulic systems have failed?

- No, only will automatically deploy if a total loss of AC power. Must manually deploy.

16

When is PTU activated?

- After second engine is started

17

When would you delay a second engine start?

- If cargo door has not been closed a fault could occur and have to perform a reset procedure. (wait 1 minute after cargo door is closed.)

18

What are the 3 types of hydraulic reservoir problems?

- Low level
- Low air pressure
- Over heat

19

Hydraulic PTU pump FAULT light?

- O verheat
- L ow reservoir quantity
- L ow reservoir air pressure

20

Hydraulic engine pump FAULT light?

- P ump low pressure
- O verheated reservoir
- L ow reservoir quantity
- L ow reservoir air pressure