REVIEW QUESTIONS – ENGINES, APU

Question 1

1. Define N1

Answer 1

Low Pressure Compressor. Single Fan and 3-stage booster

Question 2

2. Define N2

Answer 2

High Pressure Compressor. 9-stage compressor, with 4 stages of Variable Stator Vanes

Question 3

3. What are the Start Lever positions?

Answer 3

IDLE

CUTOFF

Question 4

4. What is required for selection of Reverse thrust?

Answer 4

The related thrust lever to be at idle
and RA 10 or on the ground.

Question 5

5. What fuel valve(s) close when an engine Start Lever is moved to CUTOFF?

Answer 5

The Spar Fuel Shutoff Valve and Engine Fuel Shutoff Valve close

Question 6

6. What component controls and monitors engine parameters?

Answer 6

The EEC

Question 7

7. The Electronic Engine Control (EEC) provides exceedance protection for which parameter(s) in normal mode?

Answer 7

-N1 and N2 redline overspeed

Question 8

8. In Normal Mode, what does the Electronic Engine Control (EEC) use to calculate N1 thrust ratings?

Answer 8

• Bleed air demand

- Sensed flight conditions

Question 9

9. What are the possible EEC modes with the Engine EEC switch showing both the ON (white) and ALTN (amber) displays illuminated?

Answer 9

-Hard Alternate from Soft Alternate mode.

Question 10

10. Compare thrust in EEC HARD ALTERNATE Mode to normal mode for a given thrust lever position.

Answer 10

Hard Alternate is always equal or greater to normal thrust.

Question 11

11. What does an ENGINE CONTROL (amber) light mean?

Answer 11

-Fault in the EEC that prevents dispatching. Comes one with a no dispatch fault, engine is operating, and aircraft is on the ground.

Question 12

12. What mode is active with the Thrust Mode Display indicating R-TO (green)?

Answer 12

-With Engine Display Control Panel in Auto, this is Reduced Takeoff.

Question 13

13. What causes the ENG FAIL Alert (amber) on the EGT indicator?

Answer 13

-The engine is operating at a condition below sustainable idle (50%N2) and sudden decrease.

Question 14

14. What removes an ENG FAIL Alert (amber)?

Answer 14

-Engine recovers, Start Lever moved to Cutoff, or Fire Switch is pulled.

Question 15

15. On the ground, after engine shutdown, what does a red box on the EGT Readout indicate?

Answer 15

-That an exceedance has occurred.

Question 16

16. What does “reverse video” displayed on the Engine Vibration readout indicate?

Answer 16

-High vibration levels

Question 17

17. What should the ENG VALVE CLOSED lights (blue) and SPAR VALVE CLOSED lights (blue) indicate during a normal preflight, power ON, Engines not running?

Answer 17

-Dim Blue.

Question 18

18. What does an illuminated FILTER BYPASS light (amber) indicate?

Answer 18

-That an impending fuel filter bypass might occur due to contaminated fuel filter

Question 19

19. What is the indication if the engine oil pressure drops below redline during takeoff roll (>80 kts)?

Answer 19

-a steady yellow LOW OIL PRESSURE light in the Upper Display Unit

Question 20

20. What does the Ignition Select Switch in the IGN R position select?

Answer 20

-The Right Igniter on both engines

Question 21

21. In flight, what does the Engine Start Switch in CONT provide with the Engine Start Lever in IDLE?

Answer 21

-Provides ignition to selected igniter and both igniters when N2 is below idle

Question 22

22. In flight, what does the Engine Start Switch in FLT provide with the Engine Start Lever in IDLE?

Answer 22

-Provides ignition to both igniters

Question 23

23. What does a steady START VALVE OPEN (amber) light indicate?

Answer 23

-the respective start valve is open and air is supplied to the starter.

Question 24

24. What does an amber REV indicates? A green REV?

Answer 24

-Amber - the reverser sleeve is not in the stowed position.
-Green - The reverser sleeve is in the deployed position and reverse thrust level can be raised.

Question 25

25. What does a REVERSER (amber) light on the Aft Overhead Panel indicate?

Answer 25

-The reverser is commanded to stow (and extinguishes 12 seconds later) or a malfunction has occurred.

Question 26

26. Which APU lights will accompany an automatic APU shutdown

Answer 26

-APU Annunciator and Master Caution, and maybe FAULT, LOW OIL PRESSURE, or OVER SPEED. Red Master Warning Fire