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Flight Control Laws
Terms in this set (19)
What protections do you have in Normal Law?
o High Speed
o High Angle of Attack (AOA alpha protection)
o Load Factor Limitation (+2.5/-1.0)
o Pitch Attitude (30° UP/15 DN)
o Bank Angle (67)
How does the High Speed Protection operate?
o 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? O No
What is Alpha Max?
o 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?
o When the angle of attack exceeds a PROT, pitch trim ceases and angle of attack is now proportional to sidestick deflection, not to exceed a max even with full aft sidestick deflection.
What is Alpha Floor Protection?
When the AOA exceeds a specific threshold (somewhere between Va PROT and Va MAX) the A/THR is automatically activated and commands TOGA thrust, regardless of TL position.
Alpha Floor Protection is a function of what system?
o A/THR o Requires operative A/THR system to operate.
What happens to thrust and what annunciates on the FMA when you reach Alpha Floor?
o Thrust -TOGA
o 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?
o Move TL to the TOGA detent
o Press the Instinctive Disconnect Button
o Return TL to the CLB detent
o Push the A/THR pb to engage A/THR
When is Alpha Floor Protection active?
o From lift-off through 100FT RA on approach.
. Can you override the high or low stabilities in Alternate Law?
If you are in Alternate Law, what law would Roll be?
o Direct Law
Can you stall the aircraft in Normal Law?
o Not Normal Law, but the aircraft can be stalled in all other laws
What PFD indications indicate Normal Law?
o Green for pitch, bank, and overspeed limits
o Amber/black (alpha PROT) airspeed tape
What is indicated if the PFD pitch and bank limits are amber Xs?
o You are not in Normal Law
What would cause you to revert to alternate law?
o Multiple failures of redundant systems.
What law are you in when perform the flight control check on the ground?
o Normal Law, Ground Mode
Can the aircraft be flown with a loss of all flight control computers?
o Yes, with mechanical Backup
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