Flight Controls

Question 1

Will the multi-function spoilers function in direct mode?

Answer 1

Yes (For roll only at a fixed gain)

Question 2

What is ATTCS?

How is it Auto Activated?

Answer 2

“Automatic Takeoff Thrust Control System”

Controlled by FADEC

Automatically provides RSV Thrust when TLs are at TOGA and one of the following:

• 15% difference in N1 readings
• One engine failure during T/O or G/A
• Windshear Detection

Question 3

What is the difference between normal mode and direct mode?

Answer 3

No higher level functions available in direct mode

Question 4

How is roll controlled?

Answer 4

• Ailerons
• Multifunction spoilers (outer 3 on each wing)

Question 5

Will loss of airspeed data cause the

flight controls to go into direct mode?

Answer 5

Yes

Question 6

What is the Avionics Standard Communications BUS (ASCB)?

Answer 6

Provides data exchange between all the FCMs, and with other components of the Avionics System

Question 7

Will the speed brakes / ground spoilers function in direct mode?

Answer 7

No

Question 8

High level functions for pitch?

Answer 8

• Gain on airspeed
• Elevator thrust compensation
• AOA limiting

Question 9

What is the slat/flap extension/retraction sequence?

Answer 9

• Slats extend first
• Flaps retract first

Question 10

When are the Yaw Dampers engaged?

Answer 10

After power-up of either Hyd Sys 1 or 3

Question 11

When will speed brakes automatically close?

Answer 11

• Flaps > 2
• Airspeed < 180
• TLA > 70deg

Question 12

High level functions for yaw?

Answer 12

• Yaw dampening
• Turn coordination
• Gain on airspeed

Question 13

How many spoilers are on each wing? What are their functions?

Answer 13

• 5
• 3 outer Multifunction spoilers for roll control and ground spoilers
• 2 inboard spoilers for ground spoilers

Question 14

Can an FCM override pilot input?

Answer 14

No

Question 15

What is the Controller Area Network BUS?

Answer 15

It is the communications link between the FCMs and the P-ACE units

Question 16

What happens to artificial feel if flight controls are disconnected?

Answer 16

Artificial feel is reduced by 1/2

Question 17

What is the only primary flight control that is not fly by wire?

Answer 17

Ailerons

Question 18

What is the priority for the trim system?

Answer 18

• Back-up trim
• Captain trim
• FO trim
• Autopilot trim

Question 19

What happens to the flight controls when the RAT is the only AC source?

Answer 19

• Horizontal stab trim 1/2 speed
• Slat / flap system 1/2 speed
• Flaps limited to 3

Question 20

What systems provide data to the FCMs?

Answer 20

Smart Probes and Air Data Application Modules (ADA)

IRS (Airplane Attitude and Acceleration for AoA limiting)

Proximity Sensor Electronic Modules (WoW and Ground Spoiler Position Data)

Break Control Modules (BCM) (Provides wheel speed signals for Spoiler deployment)

FADEC (Provides TLA for Elevator Thrust Compensation)

Automatic Flight Control System (Autopilot commands)

Question 21

When do Ground Spoilers Auto Retract on landing?

Answer 21

Speeds less than 45kts

AND

5 seconds