Navigation Flashcards
What is going on when the FMGCs are in DUAL mode?
1) Normal Mode
2) Both FMGCs are synched - data entered into one MCDU is transferred (crosstalk).
What is going on when the FMGCs are in SINGLE mode?
1) Sole operating FMGC, the other has failed
2) Provides all related functions with some limitations:
- 1FD1 or 2FD2 in column 5 of the FMA indicates that the FDs are using the same FMGC as a source of guidance
- OPP FMCG IN PROCESS message will appear in the MCDU scratchpad
- MAP NOT AVAIL or SET OFFSIDE RNG/ MODE messages on the failed side ND.
What is going on when the FMGCs are in INDEPENDENT mode?
1) Caused by a significant difference between two FMGCs
2) No synch data between the FMGCs
3) Each FMGC is controlled by its respective MCDU
4) INDEPENDENT OPERATION message on scratchpad of both MCDUs and illuminated amber IND light a the top of both MCDU cases.
How does the FMGC navigation auto-tuning feature work?
1) Provides LOC guidance for runways served by an ILS
2) Automatically tunes VOR and DME stations en-route for position orientation updating.
3) Automatically tunes the ILS frequency for final approach guidance when an ILS appr has been loaded into the flight plan.
How is VOR information displayed on the ND?
1) When the EFIS VOR 1/2 selector switch is placed in the VOR 1 or 2 position
2) When the VOR is identified by the FMS, the stations three letter ID will be displayed.
How is ILS information displayed on the PFD?
1) When the respective EFIS I(LS) pb is selected
2) When identified by the FMS, the stations four letter ID is displayed.
What will the STBY NAV key on the RMP do when selected?
1) Activates the STBY NAV (ILS, VOR and ADF) selector keys of the respective RMP.
2) De-activates auto-tuning capability of both FMGCS
3) The MCDU RAD NAV page is unusable
4) Green Light Illuminates next to the key indicating activation.
5) An R appears next to the tuned VOR freq.
If a VOR station has been auto-tuned by the FMGCs, how will it be identified on the ND?
What if it has been Manually tuned by the MCDU’s RAD NAV page?
What if it has been Manually tuned by RMP Standby Keys?
1) Auto Tune - only the stations three letter ID will be shown
2) Manually Tune via RAD NAV page - Underlined M will appear next to the stations three letter ID (Hard Tuned)
3) Manually Tune via RMP STBY keys - Underlined R will appear next to the stations three letter ID (Remotely Tuned)
What do the following functions of the ADIRU mode selector switches do:
OFF
NAV
ATT
1) OFF - Depowered, both ADR and IR data unavailable
2) NAV - Normal Operation, initiates IR alignment, provides IR data
3) ATT - provides only Attitude and Heading Information, the system loses the ability to navigate
How much time is needed for FAST ADIRS alignment?
30 seconds to 3 mins
What is the difference between steady vs. flashing IR ALIGN lights
1) Steady - ADIRU is operating normally in the alignment mode
2) Flashing - a fault has occurred caused by one of the below:
- Excessive Motion
- PPOS not entered into the MCDU
- Position stored at shutdown by the IRU(s) differs from PPOS in the MCDU.
What does the ON BAT light on the ADIRS panel mean and when will it appear?
1) Appears continuously when one or more ADIRU is on batt power.
2) Appears for a few seconds at the beginning of a NORMAL alignment process, when an ADIRU mode selector is moved from OFF to NAV.
3) Indicates that the respective ADIRU is capable of operating on batt power when required.
Will the ON BAT light illuminate during the FAST alignment process?
No
