FLT CTL Panel

Question 1

What does ELAC stand for?

Answer 1

Elevator Aileron Computer

Question 2

How many ELAC’s on the Airbus?

Answer 2

2

Question 3

What are the functions of the ELAC?

Answer 3

• Normal elevator and stabilizer control
• Normal aileron control
• Normal pitch and roll
• Acquisition of autopilot orders

Question 4

Under Normal Law, what does ELAC 1 control?

Answer 4

• Primary - Aileron control (roll)
• Standby - Elevator / Stabilizer control (backs up ELAC 2)
• Provides 5° aileron droop

Question 5

Under Normal Law, what does ELAC 2 control?

Answer 5

• Primary - Elevator / Stabilizer (pitch)

* Standby - Aileron control (backs up ELAC 1)

Question 6

What backs up ELAC 2?

Answer 6

ELAC 1 -> SEC 2 -> SEC 1

Question 7

What does SEC stand for?

Answer 7

Spoiler Elevator Computer

Question 8

How many SEC’s are installed?

Answer 8

3

Question 9

What functions are performed by the SEC’s?

Answer 9

• Normal roll (by controlling the spoilers)

* Speed brakes and ground spoilers (SEC 1 & 3 only)

Question 10

Under Normal Law, what do the 3 SEC’s control?

Answer 10

• Primary – Spoiler control (roll)

* Standby – Elevator / Stabilizer control (SEC 1 & 2 back up the ELAC’s)

Question 11

What is the sole purpose of SEC 3?

Answer 11

Spoiler control

Question 12

What does FAC stand for?

Answer 12

Flight Augmentation Computer

Question 13

How many FAC’s are installed?

Answer 13

2

Question 14

What are the functions of the FAC’s?

Answer 14

• Normal roll (turn coordination and yaw damping)
• Rudder trim
• Rudder travel limit

Question 15

Under Normal Law, what do the FAC’s provide (YAWL)?

Answer 15

• Yaw Control – Damping and turn coordination, rudder limiter, rudder trim)
• Airspeed Protection Computation (Alpha Prot, high / low limits, maneuvering speed, PFD speed scale)
• Windshear protection (Reactive windshear)
• Low Energy Warning Protection (“Speed, speed, speed”)

Question 16

Is full rudder deflection available during all flight regimes?

Answer 16

No. Rudder deflection is limited as a function of airspeed.

Question 17

What is the computer and priority for the Ailerons?

Answer 17

ELAC 1 -> ELAC 2

Question 18

What is the computer and priority for the Elevator and Stabilizer?

Answer 18

ELAC 2 -> ELAC 1 -> SEC 2 -> SEC 1

Question 19

How are the flight control surfaces controlled and actuated?

Answer 19

All surfaces are controlled electrically and actuated hydraulically

Question 20

When is automatic pitch trim available?

Answer 20

In flight under Normal law with bank angle less than 33° with or without autopilot engaged

Question 21

If the active elevator actuator fails, what occurs?

Answer 21

Control is transferred to the other actuator

Question 22

How is roll control normally achieved?

Answer 22

1 aileron and 4 spoilers on each wing

Question 23

If both FAC’s fail, is maximum rudder deflection available?

Answer 23

Yes, after slat extension