Engines/Thrust Levers (Powerplant/ Auto Flight, Rev. 3)

Question 1

What controls the engines in all operating regimes?

Answer 1

FADECs

Question 2

What is the power source for the FADEC?

Answer 2

• The system has its own alternator making it independent of the A/C electrical system when N2 is above 10%
• If this alternator fails, the FADEC automatically switches to A/C electrical power

Question 3

The FADEC detects a fault during automatic start. What crew intervention is required?

Answer 3

• There is no crew intervention necessary
• The FADEC will discontinue the start, dry crank to clear the fuel from the engine and attempt restart (if warranted) automatically

Question 4

How many igniters fire during a normal automatic ground start sequence?

Answer 4

• One igniter with the other serving as a backup

- The FADEC automatically alternates between the igniters (A or B) at each start

Question 5

How many igniters fire on manual or in-flight starts?

Answer 5

Two, both A and B

Question 6

On the ground, how can the A/THR be armed?

Answer 6

• By setting the thrust levers in the TOGA or FLEX detent (with a FLEX temperature inserted in the MCDU)
• At least one FD must be ON for A/THR to arm during takeoff

Question 7

What is the active range of the A/THR?

Answer 7

• Just above IDLE to the CL detent (2 engines)

- Just above IDLE to the MCT detent (1 engine)

Question 8

What determines the max thrust the A/THR system will be able to command?

Answer 8

The thrust lever angle

Question 9

What are three ways to disconnect the A/THR?

Answer 9

• A/THR pb
• Instinctive disconnect push buttons
• Thrust levers to IDLE

Question 10

WHat is the proper method of disconnecting A/THR?

Answer 10

Set the thrust lever angle to the existing EPR and push the instinctive disconnect push buttons

Question 11

How would the A/THR be disconnected for the remainder of the flight?

Answer 11

Press and hold the instinctive disconnect push button for 15 seconds. The A/THR cannot be re-engaged once this is done. ALPHA FLOOR is also lost if this is done.

Question 12

What happens to thrust and what annunciation on the FMA during ALPHA FLOOR?

Answer 12

• Thrust: TOGA

- FMA: “A.FLOOR”

Question 13

When does the aircraft leave ALPHA FLOOR and what does the FMA change to?

Answer 13

• Upon reaching a lower angle of attack

- The FMA changes to “TOGA LK”

Question 14

What should the pilot do to get out of TOGA LOCK?

Answer 14

• Push the instinctive disconnect push buttons and move the THRUST LEVERS to the CL detent, if not already in the climb detent
• Afterwards re-engage the A/THR

Question 15

When will ALPHA FLOOR activate?

Answer 15

When the A/C reaches a high AOA

Question 16

When would thrust lock occur?

Answer 16

• Thrust levers in CL detent and A/THR pb on the FCU is pushed OR
• A/THR disconnects due to a failure

Question 17

How is A/THR normally armed?

Answer 17

By advancing the thrust levers to TOGA or FLX

Question 18

What would be the normal FMA indications during a takeoff roll using FLEX thrust on a RWY with a localizer?

Answer 18

MAN FLX, SRS, RWY, A/THR (blue)

Question 19

What would the FMA indications be during takeoff roll if the A/THR didn’t arm on a runway with a localizer? Should the takeoff be aborted?

Answer 19

• SRS, RWY
• Continuing the takeoff is a safe option, but the thrust levers must be moved to the climb detent at thrust reduction altitude and the crew must manually engage A/THR

Question 20

How should A/THR be turned off?

Answer 20

Match the blue thrust lever angle indicators to the present thrust setting on the EWD and push the instinctive disconnect push buttons or move THRUST LEVERS to IDLE

Question 21

What should the pilot do to get out of THRUST LOCK?

Answer 21

Move it out of the climb detent

Question 22

What controls the engine LP fuel valves?

Answer 22

• Engine MASTER switch

- ENGINE FIRE pb

Question 23

What does a FAULT light on the ENG panel indicate?

Answer 23

• Malfunction of the thrust control
• Automatic start sequence of the associated engine aborts
• Disagree of the HP fuel shut off valve position

Question 24

When does continuous ignition automatically operate?

Answer 24

PW1100G

- S urge detected
- I gnition delay during start
- T hrust control malfunction detected
- E ngine flame out detected

IAE V2500

• M aster is Cycled
• E IU Data Failed
• E ngine Flameout / below idle in flight
• E ngine Surge
• E ng. Anti-Ice On
• A pproach Idle Selected
• T ake Off Thrust Selected (FLX (EPR mode) or TOGA thrust (EPR or rated N1 mode))

Question 25

What are the required engine warm up times?

Answer 25

• Shutdown < 2hrs = 3 mins

- Shutdown > 2hrs = 5 mins

Question 26

What is the required engine cool down time after landing?

Answer 26

3 mins all A/C

Question 27

What does the green cooling indication mean on the E/WD for NEO A/C?

Answer 27

It’s displayed when an auto dry crank is required to cool the engines before engine start

Question 28

If icing conditions exist on the ground, how is the engine run-up procedure different between NEO and CEO A/C?

Answer 28

• CEO: accelerate to min 50% N1 at intervals not more than 15 minutes apart
• NEO: accelerate to min 60% N1 at intervals not more than 30 min apart

Question 29

If during start, the ground crew reports a fuel leak from the engine, what should be done by the flight crew?

Answer 29

• CEO: run the engine for 5 minutes, if leak disappears, the flight can continue without mx action
• NEO: abort the engine start sequence. MX action is required

Question 30

How is approach idle different on NEO vs. CEO A/C?

Answer 30

• CEO: minimum approach idle speed occurs when the A/C is in flight and the flaps are extended (flap lever not at 0 position)
• NEO: minimum approach idle speed occurs when the A/C is in flight and the flaps are at CONF 3 or FULL or when the landing gear is down