Flight Control Laws

Question 1

FLIGHT CONTROL LAWS

Q:​ What protection/s do you have​ in Normal​ Law?​ ​

Answer 1

Ref: (FOM VOL. III-DSC-27-20-10-20) ​

• Load Factor​ Limitation (Clean = +2.5​ / -1.0; Dirty = +2.0 /​ 0)​ ​
• Pitch Attitude​ (30˚ UP/15˚​ DN)​ ​
• Bank​ Angle​ (67˚)​ ​
• High Speed​ ​
• High Angle​ of​ Attack (AOA​ alpha​ protection)

Question 2

FLIGHT CONTROL LAWS

Q:​ How does​ the​ High Speed Protection operate?​ ​

Answer 2

Ref: (FOM VOL. III-DSC-27-20-10-20) ​

If​ V_MO/M_MO​ plus​ a predetermined factor​ is exceeded, the​ system induces​ a pitch-up input to ​limit​ aircraft speed.

Question 3

FLIGHT CONTROL LAWS

Q:​ Can the​ pilot override​ the​ auto pitch-up associated​ with High Speed Protection​ in Normal Law?​ ​

Answer 3

Ref: (FOM VOL. III-DSC-27-20-10-20)​ ​

No​

Question 4

FLIGHT CONTROL LAWS

Q:​ What is​ Alpha Max? ​

Answer 4

Ref: (FOM VOL. III-DSC-31-40) ​

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

Question 5

FLIGHT CONTROL LAWS

Q:​ How does​ High Angle​ of​ Attack Protection operate?​ ​

Answer 5

Ref: (FOM VOL. III-DSC-27-20-10-20)​ ​

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 6

FLIGHT CONTROL LAWS

Q:​ What protection do​ you have in Alternate​ Law?​ ​

Answer 6

Ref: (FOM VOL. III-DSC-27-20-20)​ ​

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

Question 7

FLIGHT CONTROL LAWS

Q:​ Can you​ override the​ high stability in Alternate​ Law?​ ​

Answer 7

Ref: (FOM VOL. III-DSC-27-20-20) ​

Yes

Question 8

FLIGHT CONTROL LAWS

Q:​ What protections​ do you have​ in Direct​ Law?​ ​

Answer 8

Ref: (FOM VOL. III-DSC-27-20-20)​ ​

None

Question 9

FLIGHT CONTROL LAWS

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

Answer 9

Ref: (FOM VOL. III-DSC-27-20-20)​ ​

Direct Law

Question 10

FLIGHT CONTROL LAWS

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

Answer 10

Ref: (FOM VOL. III-DSC-27-20-10-20)​ ​

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

Question 11

FLIGHT CONTROL LAWS

Q:​ How would you get into Abnormal​ Attitude Law? ​

Answer 11

Ref: (FOM VOL. III-DSC-27-20-20)​ ​

By exceeding approximately double​ the​ Normal Law limits

Question 12

FLIGHT CONTROL LAWS

What is the purpose of Abnormal Attitude Law?

Answer 12

Ref: (FOM VOL III-DSC–27-20-20)

Allows the aircraft to be recovered from an unusual attitude

Question 13

FLIGHT CONTROL LAWS

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

Answer 13

Ref: (FOM VOL. III-DSC-27-20-20)​ ​

Abnormal​ Attitude Law

Question 14

FLIGHT CONTROL LAWS

Q:​ Will Abnormal​ Law revert to Direct Law​ on​ landing gear extension?​ ​

Answer 14

Ref: (FOM VOL. III-DSC-27-20-20)​ ​

No

Question 15

FLIGHT CONTROL LAWS

Q:​ What PFD indications​ indicate Normal​ Law?​ ​

Answer 15

Ref: (FOM VOL.​ III-DSC-27-20-20)​ ​

• Green =​ for pitch,​ bank, and overspeed​ limits​ ​
• Amber/black​ (alpha​ protection)​ airspeed​ tape

Question 16

FLIGHT CONTROL LAWS

Q:​ What is​ indicated if the​ PFD pitch and bank​ limits are​ amber X’s?

Answer 16

Ref: (FOM VOL. III-DSC-27-20-20)​ ​

You are​ not in Normal Law​

Question 17

FLIGHT CONTROL LAWS

Q:​ What would cause you to revert to another law? ​

Answer 17

Ref: (FOM VOL. III-DSC-27-20-20)​ ​

Multiple​ failures​ of​ redundant systems

Question 18

FLIGHT CONTROL LAWS

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

Answer 18

Ref: (FOM VOL. III-DSC-27-20-10-20) ​

Normal Law,​ Ground Mode

Question 19

FLIGHT CONTROL LAWS

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

Answer 19

Ref: (FOM VOL. III-DSC-27-20-20)​ ​

Yes,​ in Mechanical Backup

Question 20

FLIGHT CONTROL LAWS

Q:​ How is the​ airplane​ controlled in Mechanical Backup?​ ​

Answer 20

Ref: (FOM VOL. III-DSC-27-20-20)​ ​

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