2025 05 ACTS: Flight Control Laws

Question 1

Flight Control Laws:
How does the High Speed Protection operate?
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Answer 1

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

Question 2

Flight Control Laws:
Can the pilot override the auto pitch-up associated with High Speed Protection in Normal Law?
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Answer 2

No

Question 3

Flight Control Laws:
What is Alpha Max?
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Answer 3

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

Question 4

Flight Control Laws:
How does High Angle of Attack Protection operate?
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Answer 4

When the angle of attack exceeds Alpha Protection, pitch trim ceases and angle of attack is now proportional to sidestick deflection, not to exceed Alpha Max even with full aft sidestick deflection

Question 5

Flight Control Laws:
What protection do you have in Alternate Law?
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Answer 5

º Load Factor
º High speed stability (Nose up command) but can be overridden
º Low speed stability (Nose down command) but can be overridden

Question 6

Flight Control Laws:
Can you override the high stability in Alternate Law? FCOM-DSC-27-20-20

Answer 6

Yes

Question 7

Flight Control Laws:
What protections do you have in Direct Law?
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Answer 7

None

Question 8

Flight Control Laws:
If you are in Pitch Alternate Law, what law would Roll be?
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Answer 8

Direct Law

Question 9

Flight Control Laws:
When is there a direct relationship between sidestick and flight control surface deflection?
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Answer 9

º When in Normal Law, Ground Mode
º When in Direct Law
º When below 50 feet in Flare Mode (pitch only)

Question 10

Flight Control Laws:
How would you get into Abnormal Attitude Law?
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Answer 10

By exceeding approximately double the Normal Law limits

Question 11

Flight Control Laws:
What is the purpose of Abnormal Attitude Law?
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Answer 11

Allows the aircraft to be recovered from an unusual attitude

Question 12

Flight Control Laws:
After recovery from an unusual attitude, what law will you be in?
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Answer 12

When aircraft returns within normal flight envelope, the abnormal attitude law disengages and aircraft remains in alternate law with reduced protection for the remainder of the flight.

Question 13

BONUS:
Flight Control Laws:
Will Abnormal Law revert to Direct Law on landing gear extension?
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Answer 13

No

Question 14

Flight Control Laws:
What PFD indications indicate Normal Law?
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Answer 14

º Green = for pitch, bank, and overspeed limits

º Amber/black (alpha protection) airspeed tape

Question 15

Flight Control Laws:
What is indicated if the PFD pitch and bank limits are amber X’s?
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Answer 15

You are not in Normal Law

Question 16

Flight Control Laws:
What would cause you to revert to another law?
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Answer 16

Multiple failures of redundant systems

Question 17

Flight Control Laws:
What law are you in when you perform the flight control check on the ground?
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Answer 17

Normal Law, Ground Mode

Question 18

Flight Control Laws:
Can the aircraft be flown with a loss of all flight control computers?
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Answer 18

Yes, in Mechanical Backup

Question 19

Flight Control Laws:
How is the airplane controlled in Mechanical Backup?
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Answer 19

º Pitch – Trim wheel (horizontal stabilizer)
º Yaw – Rudder pedals (rudder)
º Speed – Thrust levers