Chapter A05 - Flight Management Systems Flashcards
The FMS comprises the following components:
Flight Management Computer (FMC)
Autopilot/Flight Director System (AFDS)
Auto Throttle (A/T)
Inertial Reference System (IRS)
Multifunction Control Display Unit (MCDU)
The purpose of the Multi-function Control and Display Unit (MCDU) is to provide
a human-machine interface.
In the FMC, one acts as ? and the other acts as ?
Master and Slave
FMC talk to each other via the ?
Cross-talk bus
In Independent mode the two FMCs ?
Do not not communicate with each other
In Independent mode, there is no comparison so the pilots ?
Have to monitor both systems
Single mode of an FMC is ?
Only one FMC is operational
What are the two databuses of the FMC?
Nav and Performance database
Back-up (Alternate) Navigation
Complete FMC failure
Volatile memory is?
When the power source is removed the data is removed
Non-volatile memory is?
When the power source is removed the data is not removed
The navigation database contains?
It contains the information that can be found in navigational charts, plates and manuals
How often is the database of an FMS updated ?
28 Days
Can you change the content of the database you’re using?
NO!
Can you change the database of the FMC you’re using?
YES!
What does STAR stand for?
STandard Arrival Route
How does an FMS know where it is ?
The Kalman filter does what ?
Filters the different navigation equipment (GNSS, IRS, DME, VOR/ILS) to choose the best location from the FMS
RNP stands for?
Required Navigation Performance
What is the required accuracy on an airway?
5nm
Actual Navigation Performance (ANP) is?
Current Accuracy
Required Navigation Performance (RNP) - the accuracy required to operate in a given regulated airspace (typically, _____)
*RNP is 5 NM
If ANP is higher then (RNP) _____ message will appear in FMS
- “Unable RNP”
How does
Geometry and Strength
The FMS does not cater for ____
Configuration changes
For most FMSs, the fuel prediction function, which computes the remaining fuel along the flight plan, takes into account the following parameters:
- The cruise flight level.
- The current wind computed or the resulting ground speed.
Cost index is the ratio of?
Fixed Cost to Fuel Costs
With regards to the cost index, what would be flying slow or flying fast?
What 4 pieces of information do you get off the LEGS page?
What are the 5 pieces of information you get from the PROGRESS Page?
What are the steps of setting up an FMS?
Identification page – IDENT
Position Initialisation page – POS INIT
Route Page – RTE
Departure/Arrival page – DEP/ARR
Performance Initialisation page – PERF INIT
Selection of take-off thrust page – N1 LIMIT
Take-off details – TAKEOFF REF
IDENT PAGE:
Ensure that the aircraft model is ____, fitted with engines of the _____ and that the _____ is in date. LSK 6R normally contains next start-up action, in this case, POS INIT.
- correct
*correct rating - nav database
What does the leg mode display?
Mag track and distance to waypoints
What is OEI?
One Engine Inoperative
FMS Auto-tunes VOR and DME based on..
Strength and geometry
DOES NOT auto-tune the….
ILS
Operating philosophy of the FMS is…
Master and Slave
How many dimensions does the FMS use?
4D Flight trajectory
Perf Factor in FMS as aircraft ages to show?
Degraded Performance
Cost Index of 0 gives?
Max Range
The position data (lat, long) computed by an IRS can be used by the:
1. Yaw damper.
2. FMS.
3. Radio altimeter.
FMS
The role of the FMS (Flight Management System) is to
1. Aid the crew with navigation. 5. Reduce crew workload.
2. Shut down the engine in case of a malfunction.
3. Aid fuel efficiency.
4. Automatically avoid conflicting traffic when autopilot engaged.
1, 3, 5
What are the inputs to the FMS?
1. Radio aids 4. Route data
2. Engine parameters 5. Air data.
3. Terminal data 6. Operating data.
All of the above
When can a pilot change the data in the FMS Navigation database?
They can’t. For the pilot, the FMS data base is read-only.
The period of validity of an Navigation FMS database:
Is 28 days.
What are the approaches FMS is approved to provide guidance for?
RNAV, VOR/NDB
FMS designed with the vertical navigation capability coupled to the autopilot, the FMS vertical command output can be?
A flight path angle
A speed target
VNAV Capability
-_____
-_____
NAV/LNAV
____ or ____
VNAV Capability
-A flight path angle
-Target speed
NAV/LNAV
Bank angle or Heading Demand
Which one is 4D which one is 3D?
FMS:
TAWS:
FMS: 4D
TAWS: 3D