Chapter 7 - Engines & APU Flashcards Preview

B767 - System knowledge > Chapter 7 - Engines & APU > Flashcards

Flashcards in Chapter 7 - Engines & APU Deck (37):
1

How long are MAX CONT EGT limits inhibited ?

For 5min during T/O or G/A.

2

When is the SEI (standby engine indicator) automatically activated in-flight ?

- AC power lost
- EICAS failed

3

What is the start-valve cut-out N2 value ?

50% N2.

4

With selectors in AUTO, when is ignition activated ?

- LE slats extended
- EAI on

5

When does the APU fault light illuminate ?

- APU fault (resulting in shutdown)
- APU fuel valve disagreement

6

When performing a max thrust T/O, will the commanded thrust be 100% of the max thrust ?

No, it will be 1-2% lower until 65kts and increase then.

7

Does the A/T respond to manual set reference N1 values ?

No.

8

If the ambient temperature is higher than the selected assumed temperature, is D-TO indicated ?

No.

9

Until which altitude is reduced climb possible ?

12,000ft. The 1 or 2 indication disappears at 12,500ft.

10

Which has priority: APU bleed air or electrical power ?

Electrical power.

11

Until which altitude is APU bleed air available ?

17,000ft.

12

What energizes the APU start ?

The APU battery and the main battery.

13

If the APU selector is accidently moved to OFF, can the shutdown process be cancelled ?

Yes, if RUN is still illuminated and the switch is moved momentarily to START.

14

Will the APU shut down if in-flight the battery switch is moved OFF ?

No.

15

Will the APU go through a cooldown cycle if the battery switch is moved to OFF ?

Yes, but fire protection is not available.

16

Does the APU FAULT light illuminate momentarily during APU start or shutdown ?

Yes ! (Because the light also indicates a disagreement of the APU fuel valve).

17

Can the APU FAULT light be illuminated when the APU selector is moved to OFF ?

Yes, but only in the case of an APU fuel valve disagreement. Other faults are inhibited !

18

What is the meaning of the maximum N1 indication ?

The maximum rated thrust (for all thrust settings) in the current ambient conditions. This is equal to full forward thrust lever position.

19

Is the A/T available when the EEC goes in alternate mode for either engine ?

No.

20

What is the meaning of the L/R ENG LIM PROT message when the EEC is in alternate mode ?

Engine is in the overboost range.

21

Is thrust increased when the EEC go into alternate mode ?

Yes, but only after the thrust levers have been moved to idle.

22

Does the EEC provide EGT over-temperature protection ?

No.

23

How can approach idle be manually selected ?

By moving the start selectors to CONT.

24

What is the normal N2 value to position the fuel control switch to RUN ?

20% N2.

25

How is the minimum N2 value indicated during a ground or a xbleed in-flight start ?

By the magenta fuel on-command bug.

26

What are the normal starter duty limitations ?

- 5min max
- 1,5min OFF per minute ON.

27

What are the starter re-engagement limitations ?

- 0% recommended
- 0%-20% normal
- 20%-30% emergency (fire)
- > 30% may result in damage

28

When is the engine inflight start information displayed ?

- Engine was shutdown, AND
- both EICAS primary and secondary displays selected

29

How are the igniters powered ?

MAIN AC, with AC STANDBY BUS as backup

30

Where is FF measured ?

After the engine fuel shutoff valve.

31

How many fuel pumps increase the fuel pressure between the spar and the engine fuel shutoff valve ?

Two, the first stage and the second stage.

32

How is the fuel heated before entering the engine ?

By an fuel/oil heat exchanger.

33

Where is oil pressure measured ?

After the oil pump and oil filter.

34

Where is oil temperature measured ?

After the scavenge pump.

35

Are there any procedures for an engine low oil quantity ?

No.

36

What is BB vibration ?

Broadband vibration. Average vibration level is the source cannot be determined.

37

In general, how can engine vibrations be reduced ?

By descending and reducing speed.