Flight Controls Flashcards
What are the indications that alpha lock is triggered?
A-LOCK pulses on EWD (just above the slats on the slat/flap position indicator)
What are the characteristics of abnormal attitude law?
Operates like normal law with no stabilities, and auto pitch trim is also lost
What does low speed stability do in alternate law? Can this be overridden?
Introduces a progressive nose down input, which can be overridden by pilot input
In mechanical backup, what can be used to control the aircraft?
THS, rudder and differential thrust
What does high speed stability do in alternate law? Can this be overridden?
Introduces a nose up demand when above VMO/MMO which can be overridden by pilot input
What are the flap limiting speeds for A319 and A320 in config 1
230kts
When do you get an overspeed warning?
VMO +4
MMO +0.006
At what point does AP disconnect in slow speed?
Valpha prot + 1 degree
What are the flap limiting speeds for A319 and A320 in config 3
185kts
What does FAC stand for? What does it do?
Flight Augmentation Computer.
It has several main functions, including:
Rudder trim
Rudder travel limits
Yaw damping inputs
Alternate law
Flight envelope and speed computations
Wind shear detection
At what angle of bank does the AP disconnect?
45 degrees
In what conditions might you need to reset autothrust on approach?
In A319 only, if changing configuration with speed brakes extended, A/THR may settle 10kts above applicable speed target. This can be reset by recycling the A/THR button on FCU
When is abnormal attitude law triggered?
When normal law envelope is exceeded by external forces (eg wake turbulence encounter)
What happens once recovered from abnormal attitude law?
Auto pitch trim is regained, and aircraft will be in alternate law for the remainder of the flight. The aircraft lands in alternate law
With sustained sidestick input, what will speed decay until?
ValphaMax
At what angle of bank do the FDs disappear?
45 degrees
Which spoilers deploy for speed brakes?
Middle 3
When does AP disconnect in overspeed?
VMO +15
MMO +0.04
What is the purpose of abnormal attitude law?
Prevents normal law from impeding recovery
With A/THR engaged, what lowest speed will you decrease towards?
VLS +/-2kt
When does the aircraft revert to direct law?
When in alternate law, gear down, AP off for landing
What is the high AoA protection bank angle limit?
45 degrees
What triggers alpha lock?
Activated by SFCCs when flap lever moved from position 1 to 0 and either:
Alpha above 8.5 degrees or
Speed below 148kts
How can you identify that you are in mechanical backup?
MAN PITCH TRIM ONLY in red on PFD
