Chapter 13 - Hydraulics Flashcards Preview

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Flashcards in Chapter 13 - Hydraulics Deck (15):
1

L hydraulic system, is the electric pump activated when in AUTO when there is a high system demand ?

Yes.

2

C hydraulic system, is the air pump activated when in AUTO when there is a high system demand ?

Yes.

3

R hydraulic system, is the electric pump activated when the EDP pressure is low ?

Yes.

4

C hydraulic system, is the air pump activated when one electric pump pressure is low ?

No. Only when both pumps have low pressure or high system demand.

5

What items are on the L hydraulic system ?

- Flight controls
- R yaw damper

6

What items are on the R hydraulic system ?

- Flight controls
- Normal brakes + brake accumulator
- Pitch enhancement system

7

Which hydraulic pump is inhibited during first engine start and may cause PRESS and SYS PRESS indications ?

The L electric demand pump.

8

In the C hydraulic system, is there a reserve for brakes and steering in case of a C hydraulic leak ?

Yes.

9

Can load shedding of the C2 electric pump occur ?

Yes.

10

Is the ADP normally activated during LG retraction and flaps extension/retraction ?

Yes. If the ADP is inop, this will take more time !

11

When is the C1 electric pump automatically isolated for reserve brakes and steering ?

When the system quantity is sensed low.

12

What does the RAT power ?

The flight controls portion of the C hydraulic system. Nothing else.

13

When is the HDG activated ?
How is it powered ?

When power loss occurs of both AC main busses.
By the C hydraulic system (ADP is also activated).

14

When is the RAT activated ?
What is the minimum speed ?

Failure of both engines.
130kts.

15

What indication can be expected on the C hydraulic system if the RAT is the only hydraulic source ?

C SYS PRESS light.