Chapter 2 - Air Systems Flashcards Preview

B767 - System knowledge > Chapter 2 - Air Systems > Flashcards

Flashcards in Chapter 2 - Air Systems Deck (28):
1

Does the compartment INOP light illuminate if the temperature control is OFF or trim air is OFF ?

Yes.

2

What is the meaning of the pack INOP light ?

- Pack overheat
- Fault

3

What is the meaning of the PACK OFF light ?

Pack valve is closed.

4

Does the recirculation INOP light illuminate if the recirculation switch is OFF ?

Yes.

5

How is the air warmed from the should and foot heaters ?

Electrically.

6

When is the equipment cooling NO COOLING light illuminated ?

Only in OVRD mode. No reverse air flow is being delivered !

7

What is the approximate ROC and ROD of the cabin altitude when the auto rate control is set at the index mark ?

+500 fpm, -300fpm

8

When does the cabin pressurization AUTO INOP illuminate ?

When both controllers are inop or when MAN has been selected.

9

When does the CABIN ALT light extinguish again ?

When cabin altitude is less than 8,500ft.

10

When does the APU VALVE light illuminate ?

Valve disagreement.

11

What is the meaning of the engine BLEED light ?

Bleed overpressure. The HPSOV or/and PRV are open, and should be closed.

12

Which has priority: high bleed air demand or high pack output ?

high bleed air demand. In this situation, high pack output is not possible.

13

What does the standby N(ormal) pack control do ?

Delivers constant, moderate temperature air.

14

How is temperature controlled with trim air OFF ?

Average air temperature for all zones.

15

What is the difference in equipment cooling on the ground or in-flight ?

On the ground, the supply and exhaust fan are active, hot air is expelled overboard if needed. In-flight it is normally only recirculated using the exhaust fan.

16

What is the normal cargo temperature when heated ? What about the vented bulk cargo temperature ?

- 7 deg
- 18 deg

17

When does the cargo OVHT light illuminate ?

> 32deg, the heating shutoff valve is automatically closed.

18

What happens with cabin pressure during T/O ?

Slight positive pressure

19

What happens with cabin pressure shortly before landing ? And at touchdown ?

Cabin pressure slightly below landing altitude. At touchdown, the outflow valve opens.

20

When is the outflow valve automatically closed ?

When cabin altitude > 11,000ft, in both automatic and manual modes.

21

Do the engine bleed valves close automatically under certain normal operations ?

Yes. (low demand on the ground, engine start,..)

22

Is reverse air flow to the APU possible ?

No, because of a check valve.

23

Until which altitude is APU bleed available ?

17,000 ft.

24

Are the L/R isolation valve normally open ?

No, normally closed, except for engine start.

25

Do the HPSOV and PRV normally close when the engine bleed air valves closes ?

Yes.

26

Engine bleed air valve is closed, but engine anti-ice is activated. Is EAI available ?

Yes, the PRV opens but the engine bleed air valve remains closed.

27

Which side of the bleed air system is ground pneumatic air added ?

To the L side, between the L isolation valve and the L pack.

28

Is reverse thrust affected if the respective engine bleed valve is closed ?

Yes, it may be affected. The PRV is located before reverse thrust bleed air, and may be closed.