Auto Flight Flashcards
What are the main components of the FMGS?
2 FMGCS
2 MCDUS
1 FCU (2 independent channels)
2 FACS
What are the functions of the FMGCS?
Flight guidance
Flight management
What are the 3 modes of the FMGC operation?
Independent
Single (ND displays SELECT OFFSIDE RNG/MODE)
Dual
What are the 2 modes of flight guidance?
Managed and selected
What is the managed mode of flight guidance used for?
Long term lateral, vertical and speed profiles as determined by the FMGS
What is the selected mode of flight guidance used for?
Temporary lateral, vertical and speed commands as selected with the FCU
Does selected or managed guidance have priority?
Selected
How do you determine the validity of the navigation database?
Aircraft status page on the MCDU
What input does each FMGC use for position determination?
a mix of IRS/GPS position
How does the autopilot selection influence master FMGS logic?
if 1 AP is engaged, the respective FMGS is master
If both APs are engaged, FMGS 1 is the master
If an amber SELECT OFFSIDE RNG/MODE message is displayed on the ND what action should the crew take?
An FMGS has failed and both NDs must be set to same mode and range
Can both APs be engaged during any phase of flight?
No, just during an ILS approach
What is the difference between the large and small fonts in the MCDU?
Large- Pilot entries and modifiable data
Small- Default non-modifiable data
Where do you enter the ZFW?
INIT B (not accessible after engine start)
What do amber box prompts on the MCDU indicate?
An entry is mandatory
What occurs when managed NAV mode is engaged and the aircraft flies into a flight plan discontinuity?
NAV will be lost and the HDG/TRK mode will engage
What is the function of the FCU?
Permits short term interface between the pilot and FMGS
Allows temporary modification of any flight parameter (HDG, SPD, ALT, V/S)
Used to select operational modes of the autopilots, FDs and A/THR system
What do dashes in the FCU display windows along with the adjacent white dot indicate?
Managed guidance is in use
How is selected guidance engaged?
Pull the appropriate selector knob
How do you confirm all AP, FD and A/THR inputs?
Read the FMA
Will the FCU altitude window ever display dashes?
No. Pilot selected altitude will always be displayed
What does each column mean on the PFD?
A/THR | VERTICAL | LATERAL | APPROACH CAPABILITY, DH/MDA | AP, FD, A/THR STATUS
How is the crew made aware of mode changes on the FMA?
White box is temporarily displayed around the new indication
How are armed modes displayed on the FMA?
Blue- Armed
Magenta- Armed because of a constraint
Green- Engaged
