G7500 ENGINE

Question 1

What type of engines power the Global 7500?

Answer 1

General Electric Passport 20-19BB1A

Question 2

What is the maximum thrust produced by each engine?

Answer 2

18,920 lb

Question 3

What is the bypass ratio of the Passport 20 engine?

Answer 3

5.6 to 1

Question 4

What is the function of the fuel oil heat exchanger?

Answer 4

Transfers heat between engine oil and fuel

Question 5

What does FADEC stand for?

Answer 5

Full authority digital engine control

Question 6

What system controls the engine in response to thrust commands?

Answer 6

FADEC

Question 7

What is the primary function of the main fuel pump?

Answer 7

Deliver fuel under high pressure to the FMU

Question 8

Where is the main fuel pump mounted?

Answer 8

Accessory gearbox

Question 9

What protects the fuel system from excessive pressure?

Answer 9

High pressure relief valve

Question 10

What removes contaminants from the fuel?

Answer 10

A fuel filter

Question 11

What device meters and distributes fuel for combustion?

Answer 11

Fuel metering unit

Question 12

What controls the opening angle of the fuel metering valve?

Answer 12

FADEC

Question 13

How many fuel manifolds deliver fuel to the nozzles?

Answer 13

Two

Question 14

How many fuel nozzles are mounted to the combustor?

Answer 14

Eighteen

Question 15

When is the fuel return to tank valve open?

Answer 15

Above 30000 feet and fuel colder than minus 20 Celsius

Question 16

What monitors engine conditions for maintenance reporting?

Answer 16

FADEC

Question 17

Where is fuel consumption displayed?

Answer 17

EICAS

Question 18

What is the primary thrust indication parameter?

Answer 18

N1 fan speed

Question 19

What is measured by the ITT system?

Answer 19

Gas temperature between HPT and LPT

Question 20

What is the function of the N2 sensor?

Answer 20

Measures core engine speed

Question 21

What happens if N2 exceeds 118 percent?

Answer 21

Engine shuts down

Question 22

How is engine vibration monitored?

Answer 22

Engine vibration monitoring system

Question 23

What does the air turbine starter use to rotate the engine core?

Answer 23

Bleed air pressure

Question 24

At what N2 speed does the starter air valve close?

Answer 24

56 percent

Question 25

What is the purpose of rotor bow motoring?

Answer 25

Reduces vibration before engine start

Question 26

How is ignition controlled during normal operation?

Answer 26

Automatically by FADEC

Question 27

What is the maximum tailwind for engine ground starting?

Answer 27

20 knots

Question 28

What is the normal source of air during ground start?

Answer 28

APU

Question 29

How long is the maximum engine start cycle?

Answer 29

5 minutes

Question 30

After two start attempts how long is the required cool down?

Answer 30

5 minutes

Question 31

What is the minimum oil quantity before a low oil quantity message?

Answer 31

4.3 US quarts

Question 32

What is the oil tank capacity?

Answer 32

11.6 US quarts

Question 33

What powers the FADEC during normal engine operation?

Answer 33

Permanent magnet alternator

Question 34

What is the function of the accessory gearbox?

Answer 34

Drives fuel pump oil pump and other accessories

Question 35

What protects the engine and accessories and ensures smooth airflow?

Answer 35

Nacelle

Question 36

What is the main function of the thrust reverser?

Answer 36

Helps deceleration during landing and rejected takeoff

Question 37

What prevents thrust reverser deployment in flight?

Answer 37

FADEC

Question 38

Which hydraulic system actuates the left thrust reverser?

Answer 38

Hydraulic system 1

Question 39

What is the primary indication of engine parameters?

Answer 39

EICAS

Question 40

What is the function of variable bleed valves?

Answer 40

Control airflow and eject ice

Question 41

What is the function of variable stator vanes?

Answer 41

Control HPC stall margin

Question 42

What is the main combustor type in the engine?

Answer 42

Single annular low emission combustor

Question 43

What is the function of the oil filter?

Answer 43

Protects lubrication nozzles from contamination

Question 44

How many heat exchangers cool the engine oil?

Answer 44

Four

Question 45

What is the function of the bleed air system?

Answer 45

Provides pressurized air for engine and airframe

Question 46

Which stage provides low pressure bleed air?

Answer 46

Fourth stage

Question 47

What is the function of the start bleed valve?

Answer 47

Unloads compressor during engine starting

Question 48

What is the normal idle N2 speed after engine start?

Answer 48

Approximately 65 percent

Question 49

What is the indication for a failed fuel flow meter?

Answer 49

Fuel flow computed by FADEC

Question 50

What is the indication for an impending or full bypass of both engine fuel filters?

Answer 50

L-R ENG FUEL FILTER CAS message