Powerplant

Question 1

What controls the engines in all operating regimes?

Answer 1

FADEC- Full Authority Digital Engine Control

Question 2

What redundancy does the FADEC have?

Answer 2

Dual channel redundancy- one channel is active while the other is standby

Question 3

What is the power source for the FADEC?

Answer 3

• The system has its own alternator making it independent of the aircraft electrical system when N2 is above a set value
• If this alternator fails, the FADEC automatically switches to aircraft electrical power

Question 4

If the FADEC detects a fault during automatic start, is any Crew intervention required?

Answer 4

No- the FADEC will discontinue the start, clear the engine, and attempt a restart (if warranted) automatically

Question 5

When does the FADEC command a higher engine idle speed?

Answer 5

• Bleed demands
• Approach configuration
• High engine or IDG temperatures

Question 6

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

Answer 6

• One igniter with the other serving as a backup

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

Question 7

How many igniters fire during a manual or inflight start?

Answer 7

Both A and B

Question 8

When does continuous ignition automatically operate?

Answer 8

Engine flameout detection

Question 9

What is the active range of the A/THR?

Answer 9

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

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

Question 10

What is the normal operational position of the thrust levers when A/THR is active?

Answer 10

The CL detent

Question 11

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

Answer 11

The position detent of the thrust levers

Question 12

What are 3 ways to disconnect the A/THR?

Answer 12

• Instinctive disconnect button
• Thrust levers to IDLE
• A/THR pb on FCU (not recommended)

Question 13

How do you disconnect the A/THR for the remainder of the flight?

Answer 13

Press and hold the instinctive disconnect button for 15 seconds

Question 14

After hold the instinctive disconnect button for 15 seconds, will the A/THR be able to be restored?

Answer 14

No, on ground only after both FMGC power up

Question 15

What else will you lose if you press and hold the instinctive disconnect button for 15 seconds?

Answer 15

Alpha floor protection

Question 16

When would thrust lock (THR LK) occur?

Answer 16

-Thrust levers in CL detent and A/THR pb on FCU is pushed

OR

-A/THR disconnects due to failure

Question 17

How do you get out of Thrust Lock?

Answer 17

• Move TL’s out of the detent

- Move TL’s to match the desired thrust setting

Question 18

What does a FAULT light on the ENG panel indicate?

Answer 18

• Auto start abort
• Position of FUEL HP shutoff valve abnormal
• Malfunction of the thrust control

Question 19

What are the primary differences between a manual and a normal automatic start?

Answer 19

• The FADEC provides passive survey during a manual start and will provide appropriate ECAM cautions and procedures to follow in the event of a start fault
• Auto start interruption and auto-crank are not available, except when on ground, and the start EGT limit is exceeded before 50% N2