Engine System

Question 1

N1 Componets

Answer 1

Fan
Low Pressure Compressor
Low Pressure Turbine

Question 2

N2 Componets

Answer 2

High Pressure Compressor
High Pressure Turbine

Question 3

What does N2 Drive

Answer 3

Engine Gearbox

Question 4

What Starts N2 Compressor?

Answer 4

Bleed Air Power Starter

Question 5

Accessory Gear Box Components

Answer 5

Oil Pump
Fuel Pump
Integrated Drive Generator
Starter
Hydraulic Pump

Question 6

What Operates the Accessory Gear Box

Answer 6

N2 powers Inlet Gearbox rotor and Transfer Gearbox

Question 7

Other Components of Engine

Answer 7

Thrust Reverse
Fire/Overheat Protection
Pneumatic Ducts
Cowling
Common and Central Display Units
Potable Water Pressurization Tubes

Question 8

How many EEC’s

Answer 8

2 Controllers

Question 9

Which EEC is the main?

Answer 9

Alternate between every start attempt and automatically transfer for failures

Question 10

EEC Modes

Answer 10

Normal
Soft Alternate
Hard Alternate
Idle

Question 11

Normal EEC Mode

Answer 11

Sets N1 based on flight conditions and bleed air requirements.
Compares actual to commanded N1 and adjusts HMU accordingly

Question 12

Soft Alternate

Answer 12

Required signals are not available. Uses the last valid flight condition for parameters.

Question 13

How to get into Hard Alternate EEC Mode?

Answer 13

Thrust Levers to Idle
Manually Select EEC Switch

Question 14

EEC Protection/Limitations

Answer 14

Some Overboost protection but only use for emergencies (EGPWS) in Alternate
No EGT Exceedance

Question 15

Hard Alternate EEC Mode

Answer 15

Alternate mode thrust schedule
Always equal to or greater thrust than normal mode positions

Question 15

When are you in Ground Idle?

Answer 15

Ground operations
5 seconds after rollout

Question 16

Idle Thrust

Answer 16

Ground
Flight
Approach

Question 17

When are you in Flight Idle

Answer 17

Most Phases of flight

Question 18

When are you in Approach Idle

Answer 18

Below 15,500’ MSL with the landing gear down or the flaps in the landing position
Engine Anti-Ice On
Below 15,000’ MSL if there is an issue with the signal

Question 19

Importance of Approach Idle

Answer 19

Gives a higher minimum thrust to decrease spool up time in case of a go around

Question 19

Engine Fuel System Flow

Answer 19

Fuel Tank Pumps
Engine Spar Valve (mounted in the engine mounting wing stations)
First stage engine fuel pump
IDG Oil Fuel heat exchanger
Main Engine Oil Fuel Heat exchanger
Fuel Filter
Second State Engine Fuel Pump
Hydromechanical Unit
Engine Fuel Shutoff Valve
Fuel Flow Transmitter

Question 20

Purpose of Engine Oil

Answer 20

Cool and lubricate engine bearings and accessory gear box

Question 21

Engine Oil Flow

Answer 21

Engine Driven Oil Pump
Oil Temperature Sensor
Oil Pressure Sensor
Bearings/Gear Box
Scavenge Pump
Filter
Main Engine Oil Cooler

Question 22

What do starts requrie?

Answer 22

Pressurized air
Electrical Power

Question 23

Engine Start Switch Modes

Answer 23

Ground Auto Cont Flight

Question 24

Ground Start Mode

Answer 24

Close Engine Bleed Air Valve Open Start Valve (Engine Start Valve Alert) Starter rotates the N2 Compressor In Flight- Both Powered On Ground - Selected Powered

Question 25

Auto Start Mode

Answer 25

Ignition Normally Off Both Active When: -Uncomanded Rapid N2 decrease -N2 between 57 and 50% -N2 between Idle and 5% in flight One Active when: -Flaps not up below 18,000' -Engine Anti Ice On

Question 26

CONT Start Mode

Answer 26

Ignition to selected igniter Both ignited for engine fail

Question 27

FLT Start Mode

Answer 27

Both Ignited

Question 28

When are thrust reversers active?

Answer 28

10'RA or Air Ground Safety sensor in ground

Question 29

Thrust Reverser Process

Answer 29

Electromechanical Lock Release Isolation Valve opens Hydraulic pressure unlocks and deploys reverser Interlock mechanism restricts movement

Question 30

Reverser Lights

Answer 30

On for stowing Reverse for 10 seconds. 12 seconds+ is a malfunction