FLIGHT CONTROL LAWS Flashcards
What protection/s do you have in Normal Law?
a. Load Factor Limitation (+2.5 / -1.0)
b. Pitch Attitude (30° UP/15° DN)
c. Bank Angle (67°)
d. High Speed
e. High Angle of Attack (AOA alpha protection)
How does the High Speed Protection operate?
If Vmo/Mmo plus a predetermined factor is exceeded, the system induces a pitch-up input to limit aircraft speed
Can the pilot override this pitch-up? (during High Speed Protection)
No
What is Alpha Max?
The maximum angle of attack allowed in Normal Law, indicated by the top of the red strip on the airspeed scale
How does High Angle of Attack Protection operate?
When the angle of attack exceeds α prot, pitch trim ceases and angle of attack is now proportional to sidestick deflection, not to exceed α max even with full aft sidestick deflection.
What protection do you have in Alternate Law?
a. Load Factor
b. High speed stability (Nose up command)
c. Low speed stability (Nose down command)
Can you override the high stability in Alternate Law?
Yes
What protections do you have in Direct Law?
None
If you are in Pitch Alternate Law, what law would Roll be?
Direct Law
When the landing gear is extended, what happens to Pitch Alternate Law?
Degrades to Pitch Direct Law
When is there a direct relationship between sidestick and flight control surface deflection?
a. When in Normal Law, Ground Mode
b. When in Direct Law
c. When below 100 feet with autopilot engaged
How would you get into Abnormal Attitude Law?
By exceeding approximately double the Normal Law limits
What is the purpose of Abnormal Attitude Law?
Allows the aircraft to be recovered from an unusual attitude
After recovery from an unusual attitude, what law will you be in?
Abnormal Attitude Law
Will Abnormal Law revert to Direct Law on landing gear extension?
No
