E190 - Engine

Question 1

Which engines are installed ?

Answer 1

Two GE CF34-10E engines.

Question 2

Each FADEC incorporates how many channels ?Is the FADEC part of any of the MAU’s ?

Answer 2

2 channels.No.

Question 3

What happens if you turn the engine START/STOP selector to STOP ?

Answer 3

Commands the FADEC to shut down the engine, provided that the thrust lever is in IDLE.

Question 4

What happens if you turn the IGNITION switch to OFF on the ground ? In flight ?

Answer 4

On ground: Deactivates ignition. FF is also inhibited.In flight: The switch is disregarded in OFF.

Question 5

Is ignition provided through the igniters if the IGNITION switch if OVRD and the engine is NOT running ?

Answer 5

No.

Question 6

What is the meaning of an amber REV indication ?

Answer 6

Reverser in transition.

Question 7

What is the meaning of a red REV indication ?

Answer 7

discrepancy between selected and actual reverser position.

Question 8

Is the OFF flag shown on the N1 dial if the engine is shut down on the ground ?What is shown for an engine failure in flight ?

Answer 8

No, only in-flight, by pilot action. The FAIL flag.

Question 9

When is the ITT red line shown ?

Answer 9

Until the end of the takeoff phase, OR in-flight if the ITT goes above the CON thrust limit.

Question 10

What is the meaning of the WML icon ?

Answer 10

The FADEC has detected a flame-out and the auto re-light system is restarting the engine.

Question 11

Is it possible to have a red VIB indication ?

Answer 11

No. Only green or amber (4.0 - 5.0 units)

Question 12

How is fuel routed from the tank to the engine ?

Answer 12

Ejector fuel pump - LP pump - THEN

• HP pump - fuel tank, OR
• Heat exchanger - HP pump - FF - FMU

Question 13

The engine oil pump contains how many pumping elements ? Which ?

Answer 13

5 pumping elements:1 supply pump and 4 scavenge pump elements.

Question 14

The engine oil filter incorporates:

Answer 14

A filter bypass and a cold start relief valve (for high viscosity oil during cold engine starts).

Question 15

The pneumatic engine starting system consists of:

Answer 15

• Air turbine starter (ATS)- Starter control valve (SCV)

Question 16

How are the igniters powered ?

Answer 16

Igniters A - SPDA 1 OR EICCIgniters B - SPDA 2

Question 17

How many igniters are energized for an engine start on the ground ? In flight ?

Answer 17

1 igniter on the ground, both igniters in-flight.

Question 18

What is the sequence of an engine ground start?

Answer 18

• 7% N2 - ignition- 20-25% N2 - fuel- 50% N2 - starter cut-out

Question 19

What is the FADEC sequence for a wet engine start ?

Answer 19

If there is no light-up within 15 sec, fuel and ignition are turned off. The engine is motored for 30sec, then another restart is attempted with both igniters. If no engine light-up occurs, the start should be manually aborted.

Question 20

What is the sequence of an engine x-bleed start?

Answer 20

• 7% N2 - ignition- 20-25% N2 - fuel (OR after 15sec if N2 < 15%)- 50% N2 - starter cut-out

Question 21

What is the sequence of an engine windmill start?

Answer 21

• 7% N2 - ignition- 7,2% or 15sec (whichever earlier)- 50% N2 - starter cut-out

Question 22

Does the FADEC give start-protection in-flight ?

After how many seconds should the engine start be aborted in-flight if there is no light-up ?

Answer 22

No.After 30 sec.

Question 23

On the ground, auto-relight is terminated and fuel is shutoff is N2 falls below :

Answer 23

52% N2.

Question 24

The locking system of the reversers (per engine) consists of:

Answer 24

2 actuator locks + 1 cowl lock

Question 25

Is it possible to select reverse thrust the first 30sec after an engine failure is detected ?

Answer 25

Yes. (RTO !)

Question 26

Is it possible to immediately have MAX REV upon landing ?

Answer 26

No. IDLE REV is commanded first, until the thrust reverser cowls are fully deployed. Then MAX REV is commanded.

Question 27

If a reverser is failed, what happens if you:- select both reverser at MAX REV ?- select only the operative reverser at MAX REV ?

Answer 27

• IDLE REV- MAX REV for the operative reverser.

Question 28

What happens with the engine thrust in case of uncommanded thrust reverser deployment ?

Answer 28

Idle thrust is automatically commanded.

Question 29

How is the FADEC powered ?

Answer 29

Above 50% N2 by the PMA (permanent magnet alternator). Below 50% N2 power is provided by the eletrical system.

Question 30

When is the ATTCS armed during G/A ?

Answer 30

Whenever thrust mode is GA.

Question 31

When does the ATTCS command RSV automatically ?

Answer 31

ATCCS engaged, T/L at TOGA AND:

• Engine failure during T/O or G/A, or
• Windshear, or
• N1 difference > 15%

Question 32

When does the ATTCS command RSV manually ?

Answer 32

ATCCS engaged and T/L at MAX

Question 33

When is idle thrust increased in icing conditions ?

Answer 33

When FLIGHT IDLE or APPROACH IDLE is active, but NOT for FINAL APPROACH IDLE.

Question 34

When is approach idle active ?

Answer 34

• < 15,000 ft- Gear down- Any flaps selected(- In-flight)

Question 35

When is final approach idle active ?

Answer 35

• < 1,200 ft- Gear down- Landing flaps

Question 36

At V1 - 15 kts the ITT redline changes from:

Answer 36

Max ITT for the selected T/O thrust mode to max ITT for TO-1 RSV.

Question 37

What happens if N2 > 102 % ?

Answer 37

An engine shutdown is commanded.

Question 38

What happens in case of three consecutive engine overspeed detections within 30sec ?

Answer 38

The FADEC will not relight the engine (if the engine fails).

Question 39

The FADEC provides ground engine start protection against:

Answer 39

• hot start- wet start (no light-up)- hung start

Question 40

Does the FADEC control the ITT limits ?

Answer 40

Yes.

Question 41

Above which ITT will the FADEC not allow fuel flow during ground start ?

Answer 41

Above 120 deg celsius.The SCV will be commanded open, but fuel will only be supplied when the ITT drops below this temperature.