Questions tagged [fms]
An FMS is a specialized computer system that automates a wide variety of in-flight tasks, reducing the workload on the flight crew. A primary function is in-flight management of the flight plan. [Wikipedia]
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IDLE Factor determination
The Flight Management System (FMS) utilises the Idle Factor to modify the computation of the vertical profile whilst descending.
During this phase, the FMS calculates the vertical profile and ...
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Alternative methods to determine A-320 (Pegasus R1A) Optimal FL
320 FO looking to see if anyone knows a method to determine optimal flight level (essentially compute optimal step climb point) from the F-PLN page. I’m well aware of computing optimal S/C from the ...
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Longitudinal/Lateral CG envelope for hoist operations
Does a Rotorcraft hoisting CG chart show what the CG will be as the load is hoisted from top to bottom or vice versa?
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Why did autopilot switch to CWS P on a LNAV/VNAV approach, and why didn't it reduce descent rate to comply with CDU alts when VNAV was re-engaged?
We were performing an NDB approach the other day due to the ILS being unserviceable.
We are flying a 737-800, FMC Update 14.0 (“common VNAV”)
We were using LNAV and VNAV as our roll and pitch modes ...
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Why are V speeds the last to be uploaded into a FMC?
When uploading performance information into an FMC, if you put the speeds in before other performance calculations you may get a warning. Why is this?
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What does flight ID mean here in the picture? It stated in brackets for Performance
What does flight ID mean here in the picture? It is stated in brackets for Performance. I searched but couldn't find an answer. I would be glad if you help.
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Are the terms "FMGS" and "MCDU" just Airbus-terms, or are there technical reasons behind the terminology?
I often see commotions online regarding the terminology. Are they just Airbus vs Boeing terms, or are there technical reasons behind them? In everyday speech FMC, FMS, FMCS, FMGS, CDU, MCDU can all be ...
user14897
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How do I read this flight plan route?
When I create a flight plan using SimBrief, for example for London Gatwick (EGKK) to Dublin Airport (EIDW), it generates the following route:
...
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When does the FMS in the 737NG switch to approach mode?
I fly a B737-800, and we talk about when the FMS enters "Approach mode". At this point, the FMS will command the Vref (plus additive) at the appropriate flap setting. This is helpful to know ...
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Why does the CRJ100/200’s FMS miscalculate temperatures at altitudes in excess of 36k feet?
The CRJ100/200’s flight management system (FMS) apparently is not to be used to calculate engine thrust settings when the aircraft’s altitude exceeds 36,000 feet, due to internal calculation errors at ...
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is it possible that setting a lower airspeed makes a steeper climb?
I'm now studying a Flight Management System (FMS), and it says that when the FMC predicts that the airplane will not reach an ALT constraint, the CDU will display "UNABLE NEXT ALT" and then ...
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What is the difference between a navigation database and an airport mapping database?
What is the difference between "navigation database" and "airport mapping database"? Are those both required by flight management software for flight planning?
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What does the ACARS Weight and Balance Request page look like?
In the ATSU AOC Preflight menu of an Airbus (maybe Boeing too), there is an option for a weight and balance request. The selection name varies by airline but it may say "W/B Req" "Send ...
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Why are true headings followed above 73N in the northern hemisphere, whereas in the southern hemisphere the change is made at 60S?
The question is in regards to the asymmetry of the changeover latitudes and NOT about why it needs to be changed.
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Garmin 530: What is NXRG telling me?
I have a Garmin 530 in a Cessna 550.
It has a constant display of NXRG:x:xx in the upper right corner of a map page. It changes color (yellow and green are common) ...
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How should I read these abbreviations on the Airbus 320 MCDU?
Often I have seen some abbreviations on the Airbus MCDU such as CI, CF, etc. They are explained in this question: What do the different types of approach abbreviations used on the A320 MCDU exactly ...
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What do the different types of approach abbreviations used on the A320 MCDU exactly mean?
On the MCDU I have noticed after setting up the approach there are a number of different codes which appear next to the runway designator these are namely as below:
CI
CF
FI
CD
FD
Can someone kindly ...
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Do navigation databases (by e.g. Aeronavdata or Jeppesen) include company routes?
Does the navigation database provided by database providers like Aeronavdata or Jeppesen etc include company routes?
How are the company routes maintained; are they modifiable by the OEMs?
Is the ...
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Where does an FMS wind information comes from to calculate V approach?
To calculate the V approach the FMS is using a wind either taken by the ADIRS or inserted on APPR PERF page. At first I will say that it takes the wind inserted by the crew, but I am not completed ...
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Does the A320's FMC automatically adjust the rate of descent on a non-precision approach?
Does the A320's FMC automatically adjust the rate of descent on a non-precision approach? Like a back course approach for example if the distance to altitude is (or can be) programmed in?
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Flight management System(FMS) related to Performance Managment
What are the recommends criteria and requirements for a Flight Management System (FMS) for transport aircraft related to Performance Database or Performance Management
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For a coded departure procedure (SID), Fly-At-Altitude or At-Waypoint instruction has priority in case of conflict?
I am examining various RNAV departure procedures and especially those whose purpose is to overlay the existing conventional ones. I noticed that some of them begin with a "Flight at Altitude" ...
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Is there a manual which describes the algorithmic procedure on which the Vertical Navigation Guidance is based?
I am interested in the methods implemented by Flight Management Systems in order to calculate a trajectory path of vertical navigation guidance (VNAV), which takes into consideration the legs of the ...
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Which commercial aircraft can fly Micro-SLOP procedures?
"Strategic Lateral Offset Procedures (SLOP) are approved procedures
that allow aircraft to fly on a parallel track to the right of the
centre line relative to the direction of flight to mitigate ...
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How does ADS-C and FMS relate to FANS?
So - I'm totally confused about FANS and its systems. From what I understand:
FANS 1/A (started in 90s) has some early CPDLC for USA routes (this topic) but what about position reporting? Does it ...
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Why is air traffic control done manually by humans?
I'm not a pilot but have a software developer background, so forgive my aviation naivety.
From what I understand there have been numerous issues and almost-issues relating to human air traffic ...
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What are the difference between FMC, FMS and MCDU and what do they do? +2 more questions [duplicate]
What are the difference between FMC, FMS and MCDU and what do they do?
Do airliners have all of them or just 1 or 2 of them?
Do pilots learn how to program them/it?
FMC = Flight Management Computer ...
user40208
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Do modern aircraft automatically manage the deceleration to Vref?
Typically in most aircraft, the pilot manually reduces the speed gradually until reaching the landing zone/flare zone. Modern aircraft have FMC. Does the FMC automatically manage the speed gradually ...
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Current FMS with COMM tunning function capability?
I am currently more familiar with GARMIN 1000 systems than with the ones that are used nowadays in airliners.
I know that you can tune a NAV aid from the FMC in an airliner. Actually, modern FMS ...
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What does the orange colored text in a SkyVector route indicate?
If you use a pre-made route in skyvector.com, sometimes there will be orange text.
For example: from KIAD to KTPA with default cruise settings, the second route in the list will have DADES6 in orange....
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What is the difference between FMCF and AIMS on the 777?
What is the difference between Flight Management Computing Function and Airplane Information Management System on B777?
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Where can I find an image of the Thales FMS220 RMS page?
I'm looking for photo/color image showing Thales FMS220 RMS (Radio Management System) page. Also COMMUNICATION and XPDR pages are highly welcome.
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What is the ALT INTV on the 737's autopilot?
So, I was watching a quick tutorial on the FMC on YouTube. The FMC somehow had a 5000 ft restriction, and the guy got clearance to go higher up, and he set his altitude on the AP panel, and he pressed ...
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Is the 737's autopilot part of the FMS or is it a separate entity?
I was watching a tutorial about the FMS and the autopilot in the 737, and I am consfused. I come from a Cessna background, where there is no FMS, there is only the AP (autopilot).
So, is the AP a ...
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How did KAL 007 get so far off course?
Regarding Flight 007 that got shot down in the Soviet Union, this was reported in the New York Times:
Study Says Korean Airliner Was on Its Intended Course When Downed in '83 (nytimes.com)
Excerpt:
...
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Why don't FMCs automatically include up-to-date oceanic route definitions?
In modern FMCs, flying an oceanic route requires inputting coordinates directly, often in obtuse formats (which are arguably prone to typos, but following proper procedure and a step through the route ...
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How does a higher temperature when programmed in the FMGC affect REC MAX FL?
While I was reading the FCTM I came across this line mentioned below.
An increase in the Outside Air Temperature (OAT), that results in a decrease of the REC MAX FL.
I wanted to know if we enter a ...
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Is the flight management system software independent from the hardware?
Is it possible to 'mix and match' hardware and software from different vendors to make a flight management system? I want to prepare a study about FMSes and I can see that there are several ...
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Why are the character keys on the Flight Management Computer in alphabetical order?
Regardless of which aircraft type and manufacturer, the character keys on any Flight Management Computer are always in alphabetical order, see image:
From a human factors view, this is sub-optimal, ...
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Are sequenced waypoints still displayed on the Navigation Display / FMS legs page?
This question relates to the Flight Management System of a large airliner, e.g. Boeing 787:
During a flight, when the aircraft passes a waypoint, is this just passed waypoint (and the previous ones) ...
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Is there an FMC not connected to the AP/FD?
Is it possible to have an FMC to compute the performance and navigation without having it linked to an autopilot or flight director?
Does/did such setup exist?
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Why can't flight management systems receive instructions directly from the controller?
If an aircraft's flight management system has auto pilot and auto thrust coupling, and it can make changes to the aircraft speed and direction along the entire route without pilot intervention, then ...
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What are these "F,S,O" characteristic speeds?
I am leaning for an avionics exam and I encountered a question asking for the meaning of F, S and O . They appear to be "Characteristic speeds", which are calculated by the flight management system (...
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What name is given to an abeam waypoint in the FMS?
In a Flight Management System, what name is given to an abeam waypoint in case of DIR TO?
Is this name format different in Thales and Honeywell FMS?
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How does the FOVE system work with the Airbus FMS?
The Flight Operations Versatile Environment (FOVE) is a separate software system used with Airbus aircraft by dispatchers to determine performance data to enter into the FMS. There seems to be little ...
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What is the relationship between "automatic flight control system AFCS", "autopilot", "flight director" and "flight management system FMS"?
I'm studying aircraft maintenance. I looked in my books and searched the web but couldn't make a big picture of the concept of autopilot.
Specifically what is its relation to modern systems like FMS....
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Can SID/STAR have shortened names?
I have a strange naming difference for a SID in a route. The route is:
DOME4W DOMEG Y841 ANAVI DCT NVO UM170 KENUM UM615 IDOSA UN857 RESMI
UN491 DITAL UN872 DIDAK UZ15 ARDOD A5 VALAX VALA1A
I am ...
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What are fuel biases?
Does anyone have an idea of what is it? From what I gathered from the web, it seems that this is the margin of error between the actual, real fuel consumption of the aircraft and the fuel consumption ...
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What's the difference between FMS and FMC?
What's the difference between FMS (Flight management System), and FMC (Flight management computer)?
Can the flight management computer be thought of as what's manipulating the input information from ...
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How to program an FMC if the database is missing the arrival airport?
Let's say you are in a 737 flying to Geita, Tanzania, as you can see this little airport/airstrip has an IATA code, but not an assigned ICAO code. What should you enter into the FMC if I want to fly ...
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