Engine

Question 1

How does fuel get from the fuel tanks to the engine

Answer 1

low pressure pump - returns to fuel tank as motive flow
high pressure pump - flows through fuel/oil heat exchanger to fuel filter then Fuel Metering Unit (FMU) then through high pressure pump before returning to FMU

Question 2

Describe the FMU

Answer 2

controlled by the FADEC, meters and distributes the proper amount of fuel for combustion and controls shutoff valve

Question 3

Describe the Variable Geometry Actuator

Answer 3

consists of two fuel driven actuators controlled by the FADEC via FMU, optimizes position of compressor stators for efficiency

Question 4

The engine starting system is comprised of:

Answer 4

• air turbine starter

- starter control valve

Question 5

How many igniters are used for start

Answer 5

ground - one

air - both (2)

Question 6

Does the FADEC provide abnormal engine start protection in the air

Answer 6

NO

Question 7

Describe the auto relight function

Answer 7

turns on both igniters and schedules the relight fuel flow in the event of engine flame out or if N2 falls below 52%; “WML” icon is displayed next to N2

Question 8

How is the thrust reverser system actuated and controlled

Answer 8

hydraulically actuated, control via thrust lever

Question 9

What does the T2 sensor monitor

Answer 9

engine air inlet temperature for use in FADEC control calculations

Question 10

What does the N1 sensor provide

Answer 10

fan speed data and airplane vibration monitoring

Question 11

How is the FADEC powered

Answer 11

above 50% N2 - Permanent Magnet Alternator (PMA)

below 50% N2 - electrical system

Question 12

The FADEC provides engine start protection on the ground as follows:

Answer 12

• hung start
• hot start
• no light off

Question 13

Describe the FADEC overspeed protection

Answer 13

commands engine shutdown when N2 reaches 102%, relights when within limits (unless 3 consecutive overspeeds)

Question 14

Describe the FADEC overtemp protection

Answer 14

controls ITT limits for engine start and throughout operation; will not allow fuel flow during start if ITT is above 120C

Question 15

Describe the ATTCS

Answer 15

available for takeoff and go around; automatically commands RSV when it is armed and thrust levers are at TOGA and one of the following occurs:

• difference between N1 values is greater than 15%
• one engine failure during takeoff
• one engine failure during go-around
• windshear detection

Question 16

Max thrust rating in lbs

Answer 16

14,200 lbs (t/o 1 or GA, one engine operative, attcs on)

Question 17

ENG 1 or 2 OIL LO PRESS warning

Answer 17

engine oil pressure is low

Question 18

ENG 1 or 2 REV DEPLOYED warning

Answer 18

thrust reverser deployed unexpectedly or not stowed when ordered to stow or thrust reverser position undetermined

Question 19

ENG 1 or 2 CONTROL FAULT caution

Answer 19

thrust modulation is disabled. OBV has failed open or engine will respond slowly

Question 20

ENG 1 or 2 FADEC OVERTEMP caution

Answer 20

FADEC overtemperature has been detected

Question 21

ENG 1 or 2 FAIL caution

Answer 21

engine 1 or 2 shutdown has occurred

Question 22

ENG 1 or 2 FUEL IMP BYPASS caution

Answer 22

fuel filter impending bypass

Question 23

ENG 1 or 2 FUEL LO PRESS caution

Answer 23

engine 1 or 2 fuel pressure low, backup fuel pump will be activated

Question 24

ENG 1 or 2 NO DISPATCH caution

Answer 24

no dispact condition detected by FADEC

Question 25

ENG 1 or 2 OIL LO LEVEL caution

Answer 25

engine 1 or 2 oil level is below minimum

Question 26

ENG 1 or 2 REV FAIL caution

Answer 26

thrust reverser is not available

Question 27

ENG 1 or 2 REV PROT FAULT caution

Answer 27

reverser fault detected, operation not inhibited

Question 28

ENG 1 or 2 REV TLA FAIL caution

Answer 28

respective reverser solenoid protection has failed

Question 29

ENG 1 or 2 START VLV OPEN caution

Answer 29

start valve not closed while engine running

Question 30

ENG 1 or 2 T2 HEAT FAIL caution

Answer 30

T2 heater failed

Question 31

ENG 1 or 2 TLA FAIL caution

Answer 31

dual thrust lever angle sensor failure

Question 32

ENG EXCEEDANCE caution

Answer 32

in flight engine limit exceedance detected

Question 33

ENG NO TAKEOFF DATA caution

Answer 33

takeoff data not entered successfully, discrepancy between information entered in FMS for engine 1 and 2 detected

Question 34

ENG REF A-I DISAG caution

Answer 34

ice protection mode selector knob set to the ON position with OFF or ENG in the take off data set menu

Question 35

ENG REF ECS DISAG caution

Answer 35

discrepancy between REF ECS input and actual ECS bleed configuration

Question 36

ENG THR RATING DISAG caution

Answer 36

discrepancy between maximum thrust rating of engines 1 and 2, possible asymmetric engine thrust

Question 37

ENG TLA NOT TOGA caution

Answer 37

TLA not at TO/GA position during takeoff and/or go around phase

Question 38

ENG 1 or 2 FADEC FAULT advisory

Answer 38

one FADEC channel no longer sending data

Question 39

ENG 1 or 2 FUEL SW FAIL advisory

Answer 39

fuel pressure switch indicates pressure is not low while all fuel pumps are off

Question 40

ENG 1 or 2 OIL IMP BYPASS advisory

Answer 40

oil filter impending bypass

Question 41

ENG 1 or 2 OIL SW FAIL advisory

Answer 41

oil impending bypass switch or oil pressure switch failure detected

Question 42

ENG 1 or 2 SHORT DISPATCH advisory

Answer 42

short time dispatch fault condition

Question 43

ENG 1 or 2 REV INHIBIT status

Answer 43

reverser inhibited by mx

Question 44

ENG 1 or 2 TLA NOT IDLE status

Answer 44

thrust lever angle not set to idle position during engine start