22. Autoflight Flashcards
What does the flight guidance part of the FMGS control?
Flight director
Auto pilot commands
Auto thrust commands
What does the flight augmentation part of the FMGS control?
Flight envelope computation
Maneuvering speed computation
Windshear detection
Alpha floor protection
Various yaw functions
How is the master FMGC determined?
By autopilot and/ or flight director engagement
If both autopilots are on, which FMGC is the master?
FMGC1
Which FMGC drives the auto thrust?
The master FMGC
Which FMGC drives the flight directors?
The on side FMGC
What happens if the master FMGC fails?
Auto pilot and auto thrust disengage. They can be re-engaged by using the autopilot from the healthy FMGC.
How is the FCU display driven?
By two redundant FCU controllers.
Which FMGC calculates the aircraft position?
Each FMGC calculates independently the position.
Which data is used by the FMGC to calculate the aircrafts position?
ADIRS
Radio navigation aids
GPS receivers
What is mix IRS
The average position of the three IRSs
When is SRS available on takeoff?
As long as slats are extended and V2 is available to the FMS.
What does SRS command during normal take off?
V2+10kts
What does SRS command in N-1?
V2
What will trigger a red AUTOLAND light below 200ft?
- both autopilots trip off
- loss or excessive deviation in LOC (inhibited below 15ft)
- loss or excessive deviation in G/S (inhibited below 100ft)
- disagreement in RA indications
