Engines and APU

Question 1

Define N1

Answer 1

Speed of low-pressure compressor

Question 2

Define N2

Answer 2

Speed of high-pressure compressor

Question 3

What are the start lever positions?

Answer 3

IDLE and CUTOFF

Question 4

What is required for selection of reverse thrust?

Answer 4

Related forward thrust lever is at idle

Question 5

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

Answer 5

Associated engine and spar fuel valves

Question 6

What component controls and monitors engine parameters?

Answer 6

Electronic Engine Control (EEC)

Question 7

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

Answer 7

N1 over-speed, N2 over-speed, and over-boost

Question 8

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

Answer 8

Sensed flight conditions and bleed air demand

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 or hard alternate

Question 10

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

Answer 10

Thrust is at least as high as commanded

Question 11

What does an ENGINE CONTROL (amber) light mean?

Answer 11

Non-dispatchable engine fault

Light illuminated when:

Non-dispatchable fault exists, and
Engine is operating (N2 >= 50% and start lever IDLE), and
Aircraft on ground

Question 12

What are the Thrust Mode Display annunciations?

Answer 12

TO - takeoff
TO B - takeoff bump thrust
R-TO - reduced takeoff
CLB - climb
R-CLB - reduced climb
CRZ - cruise
G/A - go around
CON - continuous
----- FMC not computing thrust limit

Question 13

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

Answer 13

N2 < 50%

Start Lever - IDLE

Question 14

What removes an ENG FAIL Alert (amber)?

Answer 14

Engine recovers, or

Start Lever - CUTOFF, or

Fire Switch Pulled

Question 15

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

Answer 15

An in-flight EGT exceedance has occurred

Question 16

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

Answer 16

Vibration exceeds 4.0

Question 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

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

Answer 18

Impending fuel filter bypass

Question 19

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

Answer 19

Steady illumination of amber LOW OIL PRESSURE on the engine display unit.

Question 20

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

Answer 20

The right igniter for both engines for GRD/CONT

Question 21

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

Answer 21

Continuous ignition to engine with the selected L/R igniter

Question 22

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

Answer 22

Continuous ignition to engine with both igniters

Question 23

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

Answer 23

Respective start valve is open and air is supplied to the starter

Question 24

What does an amber REV indicates? A green REV?

Answer 24

Amber REV indicates the reverser is in transit

Green REV indicates the reverser is fully open

Question 25

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

Answer 25

Auto-stow circuit is activated, normal if out within 10 seconds

Question 26

Which APU lights will accompany an automatic APU shutdown?

Answer 26

Fire, or Low oil pressure, or Fault, or Over Speed

Question 27

EEC Idle Speeds

Answer 27

Ground Idle ~20% N1 Flight Idle ~ 30% N1 Approach Idle ~ 40% N1 (Flaps ext or EAI on)