Questions tagged [software]

Questions about the software used in aviation systems.

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What is the difference between Jeppesen NavData & Digital Terminal Charts?

https://ww2.jeppesen.com/update-cycle-and-effective-dates-schedule/ in the link provided above, Jeppesen NavData has 28day cycle whereas Digital Terminal Charts have 14day cycle Can you provide the ...
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-1 votes
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What is the difference between JeppView for windows & eLink for windows and Jetplanner? [closed]

https://support.jeppesen.com/article?pc=In_Flight&pid=JeppView_FliteDeck&aid=kA20z000000GvAtCAK https://support.jeppesen.com/article?aid=kA20z000000Ci9TCAS JetPlanner download link in this ...
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2 votes
1 answer
132 views

Are there any external reviews of airplanes' control system software?

Is an airplane's control software source code open (or to some extent) to external review? I don't imagine it is open-sourced, but if it is completely a black box, how can we know that any accident is ...
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4 votes
1 answer
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What CAD software is most commonly used for aircraft design?

What is most commonly used CAD software for aircraft design? AutoCAD, CATIA..?
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1 vote
4 answers
351 views

What are the current challenges in software engineering for avionics? [closed]

I'm a software engineer working outside the aviation field, but I'm really passionate about avionics and I'd like to do my Master thesis in the area of software engineering for avionics. Unfortunately,...
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2 votes
4 answers
362 views

What are some possible uses of a Data Scientist in an Aerospace Engineering team? [closed]

Apparently, data science can be applied to the Aero industry, but how is a question that I still can't find an answer, and which proves to be incredibly elusive online. I don't mean the Business ...
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1 answer
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Do regulations require electronic checklists to be displayed on a cockpit screen or EFB?

As per regulation is it required to have the checklist (Normal and Emergency (drive by any alert)) as a part of the Cockpit Display System or EFB?
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1 vote
2 answers
266 views

What is the difference between Review and Analysis in DO-178C?

In the context of DO-178C, what is the difference between review and analysis of the outputs of the software development processes? Are they both the same?
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9 votes
3 answers
3k views

Can a IFR flight plan be amended or cancelled whilst in flight?

I'm asking, because ForeFlight states in their demo training video that an IFR filed flight plans can only be amended or cancelled up to 47 minutes prior to it being filed (and up to 2 hours after, ...
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What is a good and simple software for calculating propeller thrust and required power?

My main requirements: Calculate propeller thrust with big range of the altitudes (0 - 200 km) or to have air pressure input parameter, which I can type. For example pressure for 152 km is $4.98\...
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2 votes
2 answers
560 views

Does DO-178C require static code analysis for level A software?

Does DO-178C have any guidelines on using static code analysis for level A software? As per Do-178C: Section 6.3 Software Reviews and Analyses Reviews and analyses are applied to the outputs ...
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2 votes
1 answer
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Do the DO-178 standards include guidelines on cyclomatic complexity?

Is there any guideline related to the cyclomatic complexity of software that complies with the DO-178C or DO-178B standards?
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3 answers
533 views

What DAL level is IFE software certified at?

An inflight entertainment (IFE) system has software for the computers and for the seatback displays. What DAL level is the software classified at?
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6 votes
3 answers
490 views

How is device control software checked for quality?

Many, many reports on the now infamous MCAS suggest a software patch is forthcoming in the next several weeks that will address the confounding single point of failure with the two AOA sensors that ...
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0 votes
2 answers
232 views

Is DAL-A required for twin-engine helicopters with FADEC?

When operating Twin Engine helicopter with FADEC controls, is is necessary to certify at DAL-A? If so, why? Is it related to the FADEC certification or is this required for an aircraft potentially ...
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3 votes
1 answer
449 views

Can the real time operating system used in aviation equipment be certified by itself?

Can the real time operating system used in aviation equipment be certified by itself, or must it be a part of some software certification effort? I'm asking for getting a certificate of 178C. I don't ...
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10 votes
2 answers
5k views

Is there an audible warning on commercial aircraft if you try to land gear up?

In one of the comments on this question (under the accepted answer), someone remarks that Aircraft can legally fly without a system to alert the crew when they are landing with gear up, etc. Are ...
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What are these symbols in Garmin Pilot?

When I start editing a flight plan in Garmin Pilot, if I have a distance that is farther (like 1,000 nm or farther) I get these two symbols in the map on the Flight Plan pane: One is a tower and the ...
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Need Airbus A380 model in .xml format [closed]

i am looking for Airbus A380 aircraft model in xml language/ format. Can anyone provide? Or share the xml code?
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9 votes
1 answer
198 views

Is there a way to register for updates on certain NTSB investigations?

I would like to track the progress of an investigation of a particular accident, NTSB WPR18FA200. Some areas of the FAA website (advisory circulars, for example) allow users to register to receive ...
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2 answers
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What website(s) can I use to plan an IFR route along airways? WORLDWIDE [closed]

I'm looking for a good website where I can create a IFR route including the airways. I tried route finder but it doesn't give me the airways.
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2 votes
1 answer
904 views

What is required to 'upgrade' software from DAL C to DAL A?

What are the things to be noted or considered if a software which was initially treated as DAL C and later wanted to be considered as DAL A?
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85 votes
5 answers
44k views

If a pilot ejects, what is the autopilot programmed to do?

If a pilot uses their ejector seat during flight, what is the autopilot programmed to do? As a developer myself, I'd want to build in a way for the plane to try and save itself if possible (to save ...
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1 vote
1 answer
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What API can I use to get FAA NOTAMS or will this one I found work?

I am not sure if this is the correct place to ask this because it has to do with APIs with XML/JSON/SOAP, but it also has to do with aviation. I am in dire need to find an API associated with the FAA ...
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3 votes
1 answer
224 views

How frequently are avionics on large commercial aircraft updated?

How frequently are avionics on large commercial aircraft updated? And how are the systems updated?
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8 votes
1 answer
259 views

How does a PFD handle unphysically abrupt changes in the parameters it's displaying?

This question is about human factors requirements in the design of software components displaying instruments in a primary flight display. (It's not about how to implement the software.) Let's take ...
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10 votes
3 answers
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How much computing power is needed to keep commercial and military planes flying?

I've always wondered, what sort of computing power is needed to keep modern commercial and military planes in the air? There are many systems of a modern commercial plane (e.g an Airbus A350), that ...
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50 votes
3 answers
23k views

Why is Python used on aircraft although it may not be certifiable?

I recently had a discussion with people who were active in the aviation industry and told me that one of the main languages/tools they use is Python. On the other hand I have always known that people ...
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52 votes
3 answers
11k views

How dissimilar are redundant flight control computers?

Facts On Airbus aircraft there are computers to secure the flight envelope, or to move the control surfaces. FADECs totally control the engines. Computers take decisions in place of the pilots, or ...
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6 votes
1 answer
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What is the procedure to contact EASA to evaluate the certifiability of a system?

I work in academia, and often we are "accused" of living in an ivory tower with no connections to the real world. To reduce the gap between academia and this "real world" I've heard about, I would ...
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Where can I find a conceptual UML model of airline crewing activities?

I would like to know if anyone has created a UML model of the various elements of a typical crewing system. I have found online UML models for ticketing and reservation systems. However I would rather ...
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9 votes
2 answers
432 views

Does every device/software, developed for use in the cockpit, need to be certified?

Every avionic, developed for use in the cockpit has to complete a long and expensive certification process. Is this only applying for avionics, installed fixed into the aircraft or also for apps like ...
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5 votes
2 answers
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How to decode ARINC 429 data?

I am looking for some help regarding decoding ARINC 429 data. I have a CSV document that contains sequentially stored ARINC 429 labels. My overall goal is to be able to scan for 4 specific labels and ...
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5 votes
0 answers
443 views

What are the popular algorithms or softwares used in identifying or track flights by ATC? [closed]

Just curious to know about the algorithms /software used by ATC for tracking flights in real time.Can it be classified under ERP ?If no under which category does that fall ?
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6 votes
1 answer
402 views

Why does my flightplan generator come up with a very non-direct route between these two airports?

I'm currently obtaining my private pilot license and I had a random thought pass through my head so I wanted to see how long it would take to get from my airport (KGBR) to an airport in VA (KCHO). The ...
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8 votes
1 answer
6k views

How did the Thrust Reverser Deploy in Lauda Air Flight 004 crash?

How did the electronically controlled thrust reverser in Lauda Air Flight 004 (which crashed) get deployed in mid air without the pilot command. Was there a fault in the electronic controller, a ...
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16 votes
2 answers
1k views

How does Jeppesen create its US charts?

The Jeppesen and FAA IFR plates represent the same information in different ways. The FAA publishes its charts for free, but the underlying data that goes into the charts (e.g., exact coordinates of ...
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3 votes
1 answer
1k views

Where do websites like expertflyer.com get their information? [closed]

I've been looking at internet resources like expertflyer.com and KVSTool which query information like live seat maps, upgrade availability and fare bucket information. To my knowledge, this seemed ...
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5 votes
1 answer
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How can I use XFLR5 on a shape with no maximum thickness at one point?

I want to run an analysis with XFLR5 on a shape that is not really airfoil shape since it has no maximum thickness at one point only, it is basically like the shape below: But when I run an analysis,...
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15 votes
2 answers
5k views

Which CPUs and programming languages are used in new airliner flight control systems?

Are the new systems of today built with the same CPUs and programming languages and development software as those of 20 or more years ago? By new I mean that these systems are currently being ...
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1 vote
1 answer
1k views

What do FAA DERs require regarding low-level requirements in DO-178C?

Software developed for aircraft needing TA certification pretty much has to be done using a process following RTCA/DO-178C. My question regards low-level (sometimes called "derived") requirements: ...
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5 votes
1 answer
595 views

What software generated this VFR flight plan?

I recently came across this screenshot of a VFR flight plan. Does anyone know what software was used to generate it?
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8 votes
2 answers
356 views

What has been done to provide security for remote wireless updating of in-aircraft software components?

Is it true that in the latest generation of Boeing aircraft some software components / Electronic Flight Bag data can be pushed to the flight remotely via a Wireless link? If so, what sort of ...
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6 votes
2 answers
306 views

Why don't DO guidelines have examples?

As per DO-178 C section 6.2 Overview of Software Verification Activity b. When it is not possible to verify specific software requirements by exercising the software on a realistic test environment,...
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11 votes
3 answers
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How do redundancies work in aircraft systems?

I've read about many aircraft systems having redundancies. For example, both Boeing's 787, and Airbus's A380 have a triple-redundant FCS. In this case, it makes sense to act upon the majority's ...
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1 vote
1 answer
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Is there's any risk using modern C++ compiler on DAL A Display Application Flight Software? [closed]

I am C++ enthusiast and I like to design and architecture my software with latest C++ features specially with templates, but I have been struggling hard to find a way. The compiler we use for LynxOS-...
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4 votes
3 answers
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What's holding equipment manufacturers from going into multicore, RTOS-based equipment?

What's holding equipment manufacturers from going into multicore, RTOS- based equipment? Recently, Rockwell Collins certified its display systems based on RTOS: Lynx Software Technologies, LynxOS-...
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6 votes
3 answers
3k views

Why are ARINC labels are transmitted LSB first?

Why are ARINC labels reversed before transmitting them to destination and the LSB (less significant bit) is transmitted first: Actual label = 0x58: 0101 1000 ...
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5 votes
2 answers
3k views

What do I do if I wish to move my software from DAL Level A to DAL Level C?

If I wish to downgrade my software's design assurance level (DAL) from Level A to Level C, what do I need to do? What are the benefits and drawbacks of doing this?
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14 votes
2 answers
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Is it legal to use an online logbook?

I am a computer programmer and student pilot. I want to make a computer program I can use to store my logs. Can I legally do this? Can I legally store Logbook endorsements with this? Are there any ...
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