06 Flight Management System (FMS) Flashcards
What data is contained with in the FMS?
- 2x Navigation databases
- 1x Performance database
For an FMS, what data does the Navigation Database contain and how can it be interacted with?
- Contains Navigation data such as:
- VOR / NDB
- RWY
- WPT
- Airport
- SID/STAR
- Magnetic variation
- Read Only
- User defined waypoints can be added
- i.e. Data can be added but not modified
For an FMS, what data does the Performance Database contain and what does it allow for?
- AC or fleet specific
- Engine data, fuel data, weights, speeds and altitudes (Opt/Max)
- Does not allow for non-normal AC configurations
- Read only
What is the formula for the Cost Index?
Cost Index = Variable Cost / Fixed Cost
Regarding an FMS, what is the scratch pad?
The scratch pad is where data is typed before being entered into the FMS and is where received messages are displayed
Regarding the CDU (Control Display Unit) what does a solid box entry mean and what does a dashed line entry mean?
- Solid Box: compulsory entry
- Dashed Line: Optional entry
What does an ‘overfly’ symbol related to waypoint represent on an FMS page?
The AC is required to fly directly over that waypoint
In an FMS, the CDU (MCDU) is used to manually initiate what systems?
- IRS / INS
- Flight Management Computer
What do the Flight Envelope Protection systems protect the AC from?
- Exceeding aerodynamic limits
- E.g.
- Bank Angle
- Angle of Attack
- Speed
- Pitch Attitude
What systems can be connected to the Communication Management Unit (CMU)?
- FMS
- Multipurpose Control and Display Unit (MCDU)
- Communications Unit
The FMS Required Time of Arrival (RTA) function can provide?
- A speed target to satisfy a time constraint entered at a flight plan waypoint
What indication is given if the FMS system losses Radio Updating?
A warning message is displayed on EHSI and MCDU
When maintaining a heading, what does the FD take into account?
- Track deviation
- Rate of track closure
- Rate of change of track closure
Apart from the information stored in the databases and data input from the pilot, what other inputs does the FMS receive?
- Airspeed, temperature and altitude information from ADC (or ADIRS)
- Air/ground sensing logic to determine if the AC is airborne
- Clock time (captains clock)
- Flap position
- Sensors measuring fuel contents
What are the characteristics of SATCOM transmissions with regards to:
- Line of sight limitations
- Interference from the ionosphere
- No line of sight restrictions
- No interference from the ionosphere
