*Flight Controls-Flight Control Laws Flashcards
What protection do you have in Normal Law?
5
-High Speed
-High AOA (Alpha protection)
-Load Factor (+2.5/-1)
-Pitch Attitude (30 deg up/15 deg down)
-Bank Angle (67 deg)
*How does the high speed protection operate?
If Vmo/Mmo plus a predetermined factor (6 kts/0.1M) is exceeded, the system induces a pitch up input to limit aircraft speed.
*Can the pilot override this (high speed protection) pitch-up?
No
*What is Alpha Max?
The maximum AOA 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 AOA 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.
What is Alpha Floor Protection?
When the AOA exceeds a specific threshold (between Alpha Prot and V Alpha Max) the A/THR is automatically activated and commands TOGA thrust, regardless of TL position.
Alpha Floor Protection is a function of what system?
-A/THR
-Requires operative A/THR system to operate
What happens to thrust and what annunciates on the FMA when you reach A Floor?
-Thrust……TOGA
-FMA………A. FLOOR
What occurs during Alpha Floor Protection after speed increases above Vls?
FMA changes to TOGA LK
How do you regain normal A/THR?
4
-Move TLs to the TOGA detent.
-Press the Instinctive Disconnect button.
-Return the TLs to the CL detent.
-Press the A/THR pb
When is Alpha Floor Protection active?
From lift-off through 100 ft. RA on approach
Can you override the high or low stabilities in Alternate Law?
Yes
If you are in Alternate Law, what law would roll be?
Direct Law
Can you stall the aircraft in Normal Law?
Not in Normal Law, but the aircraft can be stalled in all other laws.
*What PDF indications indicate Normal Law?
2
-Green = for pitch, bank and overspeed limits
-Amber/black (A prot) airspeed tape
*What is indicated if on the PFD pitch and bank limits are amber Xs?
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 computers?
Yes, in mechanical back up.
*What protection do you have in ALTERNATE LAW?
3
-Load Factor
-High Speed Stability (nose up command) can be overridden
-Low Speed Stability (nose down command) can be overridden
*Can you override High Stability in alternate law?
yes
*What protection do you have in Direct Law?
None
*If you are in Pitch Alternate Law, what law would roll be?
Direct Law
*When is there a direct relationship between sidestick and flight control surfaces deflection?
-Normal law, ground mode.
-Direct law.
-Below 50’ in flare mode (pitch only).
*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?
When the aircraft returns within normal flight envelope, the abnormal attitude law disengages, and aircraft remains in the alternate law with reduced protection for the remainder of the flight.
*How is the airplane controlled in Mechanical Backup?
Pitch- Trim Wheel (Horizontal Stab)
Yaw- Rudder Pedals (rudder)
Speed-Thrust Levers.
