Flashcards in FLIGHT CONTROL LAWS Deck (21):
What protections do you have in Normal Law?
• High Speed
• High Angle of Attack (AOA alpha protection)
• Load Factor Limitation (+2.5 / -1.0)
• Pitch Attitude (30° UP/15° DN)
• Bank Angle (67°)
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 High Speed Protection pitch-up?
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 protections do you have in Alternate Law?
• Load Factor
• High speed stability
• Low speed stability
Can you override the high or low stabilities in Alternate Law?
What protections do you have in Direct Law?
When the landing gear is extended, what happens to Alternate Law?
Degrades to Direct Law
When is there a direct relationship between sidestick and flight control surface deflection?
• When in Direct Law
• When below 100 feet
How would you get into Abnormal Attitude Law?
By significantly exceeding the Normal Law limits
Can you stall the aircraft in Normal Law?
Not in Normal Law, but the aircraft can be stalled in all other laws
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 Attitude Law revert to Direct Law on landing gear extension?
What PFD indications indicate Normal Law?
• Green = for pitch, bank, and overspeed limits
• Amber/black (alpha prot) airspeed tape
What is indicated if the PFD pitch and bank limits are amber X’s?
You are not in Normal Law
What would cause you to revert to another law?
Multiple failures of redundant systems
What law are you in when you perform the flight control check on the ground?
Normal Law, Ground Mode
Can the aircraft be flown with a loss of all flight control computers?
Yes, with Mechanical Backup