Ch.7 (Engines/APU)

Question 1

Define N1

Answer 1

Low pressure compressor. 1 fan and a 3-stage booster

Question 2

Define N2

Answer 2

High Pressure compressor. It has a 9 stage compressor and 4 stages of variable stator vanes which control compressor loading to prevent compressor stall

Question 3

What are the start lever positions?

Answer 3

• IDLE: Ignition system energized via EEC, spar fuel SOV electrically opened, Engine fuel SOV opens
• CUTOFF: Spar and Engine Fuel SOV’s close, Ignition system de-energizes

Question 4

What is required for selection of reverse thrust?

Answer 4

The forward thrust levers must be at IDLE

Question 5

What fuel valve(s) close when an engine start lever is moved to CUTOFF?

Answer 5

Spar and Engine Fuel SOV’s

Question 6

What component controls and monitors engine parameters?

Answer 6

The EEC (electronic engine control) which is a full-authority digital engine control (FADEC)

Question 7

*The Electronic engine control (EEC) provides exceedance protection for which parameter(s) in
normal mode?

Answer 7

Structural Limit protection

Question 8

In normal mode, what does the EEC use to calculate N1 thrust ratings?

Answer 8

Sensed flight conditions and bleed air

Question 9

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

Answer 9

Soft Alternate Control mode and Hard alternate control mode when hard mode was selected by retarding the thrust to IDLE

Question 10

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

Answer 10

Hard Alternate control mode thrust is always equal to or greater than normal mode for the same thrust lever position.

Question 11

What does an ENGINE CONTROL (amber) light mean?

Answer 11

The EEC has detected a fault in the Engine Control system that is not dispatchable.

Engine must be operating (N2 above 50%) and Aircraft on the ground

Question 12

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

Answer 12

Reduced take off

Question 13

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

Answer 13

Engine operating below a sustainable ide (50% N2) with the Engine start lever in the Idle
position

Question 14

What removes the ENG FAIL Alert?

Answer 14

Engine recovery, Engine Start Lever to Cutoff, Fire switch pulled

Question 15

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

Answer 15

An inflight exceedance of EGT has occurred

Question 16

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

Answer 16

The vibration has exceeded 4.0 unites

Question 17

What should the ENG VALVE CLOSED lights (blue) and SPAR VALVE CLOSED lights (blue) indicate during a normal preflight, power on, Engines off?

Answer 17

Dim blue because they are closed until the Engine Start lever is moved to IDLE

Question 18

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

Answer 18

An impending fuel filter bypass condition due to a contaminated filter. (EEC turns on the bypass light before the actual bypass occurs)

Question 19

What is the indication if the engine oil pressure drops below redline during take off roll (<80kts)?

Answer 19

Nothing until 400’RA or 30 seconds after reaching 80KIAS (whichever occurs first). After that the Low oil pressure light will flash for 10 seconds then remain steady

Question 20

What does the ignition switch in the IGN R position select?

Answer 20

The right ignitor is selected for both engines

Question 21

In flight, what does the Engine Start Switch in CONT provide with the engine start lever in idle?

Answer 21

Ignition is provided to the selected ignitors

Question 22

In flight, what does the engine start switch in FLT provide with the Engine Start Lever in IDLE?

Answer 22

Ignition is provided to both ignitors

Question 23

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

Answer 23

The respective start valve is open and airflow is being provided to the starter

Question 24

What does an amber REV indicate? Green REV?

Answer 24

• Amber: A reverser sleeve has moved out of the stowed position
• Green: Reverser has reached the deployed position

Question 25

What does REVERSER (amber) light on the aft overhead panel indicate?

Answer 25

Thrust reverser is commanded to stow. Extinguishes 10 seconds later. IF on for more than 12 seconds, a malfunction has occurred and the ENG annunciator and Master Caution illuminate

Question 26

Which APU light will accompany an automatic APU shutdown?

Answer 26

3: Fault, Over speed, Low Oil pressure