Flight Control

Question 1

Where can we control the Flight Control Computers?

Answer 1

Via the Overhead Panels

Question 2

Difference between conventional aircraft controls and Fly by Wire?

Answer 2

Convention uses cable and pulleyes. Fly by Wire uses electrical wires, computers. Less weight. More protections.

Question 3

What are the parts of the Flight Control System?

Answer 3

1. Elevators
2. Ailerons
3. THS - Trimmable Horizontal Stabilizer
4. Rudder
5. Ground Spoilers
6. Speed brakes

Question 4

How many Flight Control computers are there and what are they? Any additional?

Answer 4

There are 7 main Flight Control computers.

1. 2 ELAC
2. 3 SEC
3. 2 FAC

Additional are 2 FCDC’s

Question 5

What do the FCDC do?

Answer 5

They take data from the ELAC and SEC and send it to the EIS (Electronic instrument System)

Question 6

What does ELAC,SEC, FAC stand for?

Answer 6

1. ELAC - Elevator and Aileron
2. SEC - Spoiler and Elevator
3. Flight Augmentation Computer

Question 7

What do the FAC do?

Answer 7

1. Control rudder, rudder trim, yaw damper inputs
2. Flight envelope and speed function
3. Low energy warning
4. Windshear detection

Question 8

Where do the data of FAC’s go?

Answer 8

Direct to the EIS

Question 9

3 functions of Spoilers?

Answer 9

1. Speed brakes uses the 3 center surfaces
2. Roll uses the 4 outer surfaces
3. Ground spoilers use all surfaces

Question 10

What computers control the Slats and Flaps? How are they controlled and actuated?

Answer 10

Electrically controlled and hydraulically actuated by 2 SFCC. Slats and Flaps Control Computers

Question 11

How many channels does each SFCC have?

Answer 11

2. One for the Flaps and one for the Slats

Question 12

What are the lift augmentation devices?

Answer 12

1. 5 Slats on each leading edge

2. 2 Flaps on each trailing edge

Question 13

Where do you see the indications for the Flaps and Slats position?

Answer 13

On the EWD and SD Flight Control page

Question 14

What happens in the event of a WING TIP BRK ON on ECAM?

Answer 14

Flaps are locked into place

Question 15

Are there any control surface with a mechanical back up?

Answer 15

The THS and Rudder

Question 16

What is Aileron Droop?

Answer 16

Ailerons are drooped 5deg when flaps are extended.

Question 17

What happens to the Slats and Flaps if one hydraulic system is not available or one SFCC is inoperative?

Answer 17

They operate at half speed

Question 18

Flaps can only be set at 1+F when…

Answer 18

The speed is less than 100kts or config 2, 3, full had been set previously