Flight Control Laws

Question 2

What protection do you have in Normal Law?

Answer 2

• Load Factor Limitation (+2.5/-1)
• Pitch Attitude (30 degrees UP/15 degrees DN)
• Bank Angle (67 degrees)
• High Speed
• High AOA (AOA Alpha Protection)

Question 3

How does the High Speed Protection operate?

Answer 3

If Vmo/Mmo plus a predetermined factor is exceeded, the system induces a pitch-up input to limit aircraft speed

Question 4

Can the pilot override this pitch-up?

Answer 4

No

Question 5

What is Alpha Max?

Answer 5

The maximum AOA allowed in Normal Law, indicated by the top of the red strip on the airspeed scale

Question 6

How does High AOA Protection operate?

Answer 6

When the angle of attack exceeds alpha prot, pitch trim ceases and AOA is now proportional to sidestick deflection, not to exceed alpha max even with full aft sidestick deflection.

Question 7

What protection do you have in Alternate Law?

Answer 7

• Load Factor Stability
• High speed stability (Nose up command)
• Low speed stability (Nose down command)

Question 8

Can you override the high or low stabilities in Alternate Law?

Answer 8

Yes

Question 9

What protections do you have in Direct Law?

Answer 9

None

Question 10

If you are in Pitch Alternate Law, what law would Roll be?

Answer 10

Direct Law

Question 11

When the landing gear is extended, what happens to Pitch Alternate Law?

Answer 11

Degrades to Pitch Direct Law

Question 12

When is there a direct relationship between sidestick and flight control surface deflection?

Answer 12

• When in Direct Law

- When below 100’

Question 13

How would you get into Abnormal Attitude Law?

Answer 13

By exceeding approximately double the Normal Law limits

Question 14

Can you stall the aircraft in Normal Law?

Answer 14

Not in Normal Law, but the aircraft CAN be stalled in other laws

Question 15

What is the purpose of Abnormal Attitude Law?

Answer 15

Allows the aircraft to be recovered from an unusual attitude

Question 16

After recovery from an unusual attitude, what law will you be in?

Answer 16

Abnormal Attitude Law

Question 17

Will Abnormal Law revert to Direct Law on landing gear extension?

Answer 17

No

Question 18

What PFD indications indicate Normal Law?

Answer 18

• Green: for pitch, bank, and overspeed limits

- Amber/Black (alpha prot) airspeed tape

Question 19

What is indicated if the PFD pitch and bank limits are amber Xs?

Answer 19

You are not in Normal Law

Question 20

What would cause you to revert to another law?

Answer 20

Multiple failures of redundant systems

Question 21

What law are you in when you perform the flight control check on the ground?

Answer 21

Normal Law, Ground Mode

Question 22

Can the aircraft be flown with a loss of all flight control computers?

Answer 22

Yes, in Mechanical Backup

Question 23

How is the airplane controlled in Mechanical Backup?

Answer 23

• PITCH: Trim Wheel (horizontal stabilizer)
• YAW: Rudder Pedals (Rudder)
• SPEED: Thrust Levers

Question 24

What is the meaning of USE MANUAL PITCH TRIM?

Answer 24

You are in Direct Law

Question 25

Under Normal Law, what does ELAC 1 control?

Answer 25

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

Question 26

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

Answer 26

• Yaw Control (Damping & Turn coordination, rudder limiter, rudder trim)
• Airspeed protection computation (Alpha Prot, High/low limits, manoeuvring speed, PFD speed scale)
• Windshear protection
• Low Energy Warning Protection (“SPEED, SPEED, SPEED”)

Question 27

How can you determine you are in Alternate Law?

Answer 27

• Amber “X’s” at the pitch (30 degrees up/15 degrees down) and Bank (67 degrees) limits
• Only Vls and Vsw is displayed on the airspeed scale

Question 28

What do flashing green CAPT and F/O SIDESTICK PRIORITY lights indicate?

Answer 28

Both sidesticks have been moved simultaneously and neither pilot has taken priority

Question 29

What happens when both pilots make an input simultaneously on the sidesticks?

Answer 29

• The inputs are algebraically summed up to the normal limits
• An aural “Dual Input” will sound
• Green CAPT and F/O lights will illuminate