*Flight Controls-Flight Control Panel

Question 1

*What does ELAC stand for?

Answer 1

Elevator Aileron Computer

Question 2

*How many ELACs are there?

Answer 2

2

Question 3

*What are the functions of the ELAC? 7

Answer 3

-Control of the elevators, ailerons, and the Trimmable Horizontal stabilizer (THS).
-The ELACs compute the need for roll spoiler movement (which is sent to the SECs), and rudder yaw movement (which is sent to the FACs).

-Normal elevator, stabilizer and aileron control
-Normal pitch and roll
-Alternate pitch
-Direct pitch and roll
-Abnormal attitude
-Aileron droop
-Aquisition of autopilot orders

Question 4

In the event a single ELAC should fail, what would happen?

Answer 4

The remaining ELAC is capable of providing complete control of the ailerons, elevators, and THS (Trimmable Horizontal Stabilizer).

Question 5

*What does SEC stand for?

Answer 5

Spoiler Elevator Control

Question 6

*How many SEC’s are installed?

Answer 6

3

Question 7

*What functions are performed by the SECs? 6

Answer 7

-Normal roll (spoilers)
-Direct roll
-Alternate pitch (SEC 1 and 2 only)
-Direct pitch (SEC 1 and 2)
-Speed Brakes and Ground Spoilers (SEC 1 & 3)
-Abnormal attitude

Question 8

What does a FAULT light in the SEC pb mean

Answer 8

The SEC is inoperative.

Question 9

What do you lose when a SEC is inop?

Answer 9

The spoiler panels associated with the failed SEC are inoperative.

Question 10

Both ELACs fail, can any of the SECs provide backup and of what functions?

Answer 10

SECs 1 and 2, can provide backup pitch control of the elevators and THS (Trimmable Horizontal Stabilizer). Aileron control is lost and the ailerons streamline. Roll is accomplished with just the spoilers.

Question 11

*What does FAC mean?

Answer 11

Flight Augmentation Computer

Question 12

*How many FACs are there?

Answer 12

2

Question 13

*What are the functions of the FACs?
4

Answer 13

-Normal Roll (turn coordination and yaw damp)
-Rudder trim
-Rudder travel limit
-Alternate Yaw

Question 14

What happens if you select a FAC pb to OFF?

Answer 14

Deactivates the corresponding yaw dampening and rudder trim functions to that FAC. If the FAC is still operable, it continues to compute all flight envelope functions and maneuvering speeds.

Question 15

*Under Normal Law what does ELAC 1 control?

Answer 15

Primary- Aileron Control
Stand by-Elevator/Trimmable Horizontal Stabilizer (THS) control (backs up ELAC 2).

Question 16

*Under Normal Law what does ELAC 2 control?

Answer 16

Primary- Elevator/Stabilizer (pitch)
Standby- Aileron control (back up ELAC 1)

Question 17

*Under Normal Law, what do the 3 SECs control?

Answer 17

Primary- Spoiler Control
Standby- Elevator/Stabilizer control (SEC 1 & 2 back up ELACS)

Question 18

*What is the sole purpose of SEC 3 in Normal Law?

Answer 18

Spoiler control (1 & 2 only)

Question 19

*Under Normal Law, what do the FACs provide?
(YAWL)

Answer 19

Y-Yaw Control (Damping and turn coordination, rudder limiter, rudder trim)
A-Airspeed Protection Computation (A. Prot, hi/low limits, maneuvering speed, PFD speed scale)
W-Windshear protection (Reactive and NOT predictive)
L-Low Energy Warning Protection (SPEED, SPEED, SPEED)

Question 20

*Is full rudder deflection available during all flight regimes?

Answer 20

No. It is limited as a function of speed

Question 21

*How are the flight control surfaces controlled and actuated?

Answer 21

All surfaces are controlled electronically and actuated hydraulically

Question 22

*When is auto pitch trim available?

Answer 22

In flight under Normal Law with bank angles less than 33 degrees with or without autopilot.

Question 23

*How is roll control normally achieved?

Answer 23

1 aileron and 4 spoilers per wing

Question 24

*If both FACs fail, is maximum rudder deflection available?

Answer 24

Yes, after slat extension.