POWERPLANT

Question 1

How are the FADECs powered?

Answer 1

The system has its own alternator making it independent of the aircraft electrical system. The alternator comes online above 10% N2

If the alternator fails the FADEC automatically switches to aircraft electrical power.

Question 2

If the FADEC detects a fault during an automatic start, what crew intervention will be required?

Answer 2

None. The FADEC will discontinue the start, dry crank to clear the fuel from the engine, and attempt a restart (if warranted) automatically.

Question 3

How many igniters fire during an automatic ground start sequence?

Answer 3

One, with the other serving as a backup.

The FADEC automatically alternates A and B in each subsequent start.

Question 4

How many igniters fire during a manual or in-flight start?

Answer 4

Two, A and B

Question 5

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

Answer 5

Provided at least one FD is on, advancing the thrust levers to TOGA or FLEX (as appropriate) the A/THR will be armed.

Question 6

What is the active range of the
A/THR?

Answer 6

Just above idle to the CL detent with 2 engines

Just above idle to the MCT detent with only 1 engine

Question 7

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

Answer 7

Thrust Lever Angle

Question 8

What are 3 ways to disconnect
A/THR?

Answer 8

• the A/THR pb
• the instinctive disconnect buttons
• Thrust levers idle

Question 9

What is the proper way to disconnect
A/THR?

Answer 9

First match the thrust lever angle to the current EPR, then push the instinctive disconnect buttons.

Question 10

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

Answer 10

Press and hold the instinctive disconnect buttons for 15 seconds.

The A/THR cannot be re-engaged once this is done.

ALPHA FLOOR will be lost as well.

Question 11

What happens during
ALPHA FLOOR?

Answer 11

Thrust - TOGA

FMA - A FLOOR

Question 12

When does the aircraft leave ALPHA FLOOR, and what changes on the FMA?

Answer 12

Upon reaching a lower angle of attack.
The FMA changes to TOGA LK

Question 13

When will ALPHA FLOOR activate?

Answer 13

high AOA

Question 14

When would Thrust Lock occur?

Answer 14

Thrust levers in the CL detent and the A/THR pb on the FCU pressed, or if the A/THR disconnect due to a failure.

Question 15

How do you get out of THR LK?

Answer 15

Move the thrust levers out of the
CL detent

Question 16

What controls the LP fuel valves?

Answer 16

Engine Master sw

ENGINE FIRE pb

Question 17

What does a FAULT light on the ENG panel indicate?

Answer 17

Abnormal position of the HP fuel valve, or…

An automatic start sequence abort, or…

A thrust control malfunction