Flight Control Laws Flashcards
What protections do you have in Normal Law?
- High speed
- High AOA
- Load factor limitation (-1.0/+2.5)
- 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 a pilot override the overspeed protection pitch up?
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 AOA protection operate?
When the AOA exceeds Alpha Prot, pitch trim ceases and AOA is now proportional to side stick deflection, not to exceed Alpha Max even with full aft side stick deflection
What is Alpha Floor Protection?
When the AOA exceeds a specific threshold (typically somewhere between Alpha Prot and 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 Alpha 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?
- Move TL to TOGA detent
- Press the instinctive disconnect button
- Return TL to CLB detent
- Push the A/THR pb to engage
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 PFD indications indicate Normal Law?
- Green = for pitch, bank, and overspeed limits
- Amber/black (Alpha Prot) airspeed tape
