Questions tagged [avionics]

Avionics is applied electronics to aviation. Radars, radios, instruments, dashboards, they all belong to this category.

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834 views

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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1answer
735 views

What is the benefit of upgrading Flight Management System to version UNS-1Ew? [closed]

I am working in a private airlines. We have some Dash-8 Q400 aircraft in our fleet. Recently a SB has been issued telling us to upgrade the Flight Management System from UNS-1E to UNS-1Ew. Can ...
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1answer
99 views

What is the required accuracy of an airspeed indicator?

What FAA document specifies the accuracy to which an airspeed indicator must be calibrated to?
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1answer
218 views

Does anyone have photos of internal parts of ELAC, FAC, SEC or Boeing 777 flight computers?

I'm an electrical engineer and I'm interested in civil aviation, more specifically in fly-by-wire planes like the Airbus A320, Boeing 777 and others. But I fell in love with the Airbus A320 as it is ...
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2answers
501 views

How many labels are defined in ARINC 429 for calibrated altitude?

How many labels are defined in ARINC 429 for calibrated altitude?
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1answer
3k views

What are the ICAO equipment codes for those Garmin units? [closed]

What are the ICAO equipment codes for those Garmin units? Garmin G500 / 750 / 650 WAAS navigators?
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1answer
248 views

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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1answer
173 views

Does the nearest function on a G1000 allow for listing of anything other than nearest airports?

In non G1000 GPS systems, I have seen several pages for selecting the nearest airport, VOR, NDB, intersections, and waypoint, but in a G1000, I can only seem to get a listing of the nearest airport, ...
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2answers
221 views

Why did this old Japan Nakajima J1N airplane use a Yagi rather than a parabolic antenna?

Picture source. As per my understanding, a Yagi antenna is a directional antenna with limited gain, which it broadcasts or receives the microwave signal to and from the front side. It can only ...
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1answer
662 views

How is the center ILS used on the 747-400?

The aircraft has 3 ILS receivers, but only ILS L and R in the CDUs. How does the ILS C is put into action?
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1answer
207 views

What is the “A/B AUTO EXT” button for in a Falcon 7X?

What is the "A/B AUTO EXT" button in the overhead panel of the Dassault Falcon 7X? I see it's in the Flight Control section but I don't know what is its purpose. (sorry for low quality image)
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2answers
3k views

Are the discrete I/O considered to be part of the ARINC interface?

A typical connection used to transmit/receive ARINC data might consist of a cable and a connector similar to the one shown below. Although ARINC transmit/receive channels aren't the only thing this ...
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1answer
127 views

Do the rules used in modern soaring competitions forbid gyroscopic flight instruments, or forbid the use of AHRS-driven attitude displays, etc?

In the past, the rules for soaring competitions in the US and many other countries have not permitted gliders (sailplanes) to have working gyroscopic instruments installed, to prevent pilots from ...
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1answer
149 views

How does the G1000 differ from an airliner’s avionics?

I'm going through my multi-engine rating, and my flight training has always been on the G1000. I've had a simple system course on the CRJ-200. In terms of IFR flying, I really don't see much ...
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1answer
122 views

Are modern airliner avionics spill-proof? [duplicate]

I thought about this today, and didn't find much other than a flight decades ago that made an emergency landing due to spillage causing the trim wheel to uncontrollably pitch the plane down into a ...
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1answer
148 views

How to remove a course reversal (hold) on a Garmin 530W?

How can I remove a course reversal, (hold) from the FLP page on an RNAV approach ? If I want to do a straight in (NoPT) it will not allow me to remove the hold without removing the whole waypoint.
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1answer
151 views

What is the difference between ARINC 429 labels 025 and 102 for Selected Altitude?

What is the difference between ARINC 429 labels 025 and 102 for Selected Altitude?
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1answer
63 views

How do ETSOAs/TSOAs expire?

EASA can issue an ETSOA (Euro-Technical Standard Order Authorization/Approval) for certain equipment design, to simplify installation authorization on an aircraft type design. I found no notice of ...
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1answer
688 views

How does this IMU work and how to convert its output into meaningful information?

To understand more about IMUs and IRS, I have chosen the Honeywell 6DF-1N6-C2-HWL Inertial Measurement Unit as an example: I don't see any mention of the output of the IMU in the linked datasheet - ...
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1answer
125 views

Can I do a dual VOR check on the ground?

I know that the regs are ambiguous on the subject, but does anyone have a good argument as to why or why not you can do a dual VOR check on the ground if the VOR signal is good? For my particular ...
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1answer
66 views

Best Practices when removing/inspecting/mounting control surfaces?

I am looking for a better way to essentially "mount" the control surfaces from a Boeing 737-747-777-787 and MD-11's. The current process is to just remove them and strap to a table. The issues with ...
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2answers
358 views

Where to find general A320 E&E Compartment Information?

I'm student in electrical engineering and write my thesis on some topic of the e&e compartment. The main focus is on the computers of the A320 flightcraft, actually called E&E Compartment. ...
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2answers
1k views

What requirements do A&Ps (AMT) have to work on avionics?

Is there any additional requirement for A&Ps to work on avionics or is that even a totally different license? I just wonder why only a few A&Ps I met, also do avionics.
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1answer
662 views

Does a Boeing 737 NG have Air Data Modules for the standby Pitot probe and static pressure port?

In other words, how does the ISFD calculate the air data and IR parameters? Or is the ISFD an ADM by itself?
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1answer
588 views

Does TCAS II equipment satisfy the required ADS-B installation?

The title says it all. If TCAS II is installed and functioning, does it satisfy the ADS-B OUT mandates?
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1answer
450 views

Which AFDX connections are used in Airbus A380?

AFDX is defined by ARINC 664 Part 7 and used in Airbus A380, I would like to know in which connections on the aircraft is used and for which purposes? Does anyone knows the answer or good ...
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1answer
302 views

How can I troubleshoot an intercom interference issue in a Piper PA-28?

Our Piper PA28-181 doesn't want to let us communicate via its own intercom panel in the dashboard. We connect via the pilot port and an "Intercom SL300". When connected there is a annoying sound on ...
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1answer
270 views

Are well-known IR AAMs 'compatible' with aircraft from other countries?

The AA-2 Atoll was a Russian reverse-engineered clone of the AIM-9B Sidewinder. There are some sources that indicate, with varying degrees of veracity, that it was a good enough clone that the two ...
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0answers
65 views

How would I confirm the DC polarity of a 1960's Turn and Slip Indicator?

I have a 1960's gyroscopic turn indicator which I would like to power up. It has, what I presume to be, some kind of standard connector and the plate confirms 28 Volts DC. The pins are labeled "A&...
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48 views

Does the Flight Acquisition Unit on the Boeing 737 NG stream data?

I noticed on B737-800 entering the flight deck on the right side there is a port Data Loader and I think this is the Flight Acquisition Unit. Is this port used exclusively for loading data to FMCs etc ...
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0answers
107 views

What is the communication protocol for the side-stick in the F-16 or F/A-18?

The side-stick in the F-16 or F/A-18 communicates with the flight control computer to transmit the pilot inputs. This transmission uses a protocol. Which protocol?
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95 views

Can I change the max bank angle on the Garmin G1000 in the C172SP?

I wonder if I can change the max bank angle on the G1000/GFC700 avionics in a C172SP, like you can on the MCP of the 737NG?
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87 views

Where is pure outside static air pressure indication on A320?

I'm looking for the indication of the outside static air pressure in the cockpit. Where is it located? One of the ECAM pages? Thanks!
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0answers
97 views

Aircraft with load sensors in their undercarriage to calculate CG [duplicate]

In another question on SE aviation I read that certain aircraft have load sensors in their undercarriage to calculate CG. Which are these types? The technology to build load sensors into the ...
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1answer
327 views

How does a G1000 equipped with a GDC 74 calculate IAS from dynamic pressure?

How exactly does a G1000 system equipped with a GDC 74 air data computer calculate the indicated airspeed that is displayed on the PFD from difference between the total and static pressure (i.e. ...
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1answer
196 views

Depth and range for FDR/CVR black box detection [duplicate]

What is the maximum depth range of a FDR underwater, at which it is able to be detected by receivers? I want to know the maximum range of ULB pinger locator if it's submerged.
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2answers
2k views

Was any MiG-29 modernized to incorporate digital systems?

Did any air force using the MiG-29 ever modernize their aircraft so that they can fly on fully digital equipment such as the following? Digital HUD Digital fly-by-wire Digital navigation system ...
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2answers
2k views

What is the standard power supply and voltage supply on modern airliners?

I'm looking at reducing the weight footprint of some of the computer systems on a commercial liner. A big consumer of weight seems to be in power supplies and conversion. Being a computer guy, I don't ...
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1answer
276 views

Is there a brightness switch for the AOA gauge on the F-16?

Is there a brightness switch for the AOA gauge on the F-16? Please share a picture with the panel if you can.
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1answer
133 views

Why do ELT panel switches have batteries in them?

Does anybody know why ELT remotes (the panel mounted switches with LEDs) have batteries in them? The ELT itself has a big battery and there's a wire between them that the ELT could use to supply power ...
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1answer
74 views

Does the civil industry use the CAN FD bus?

Does anyone know if commercial aircraft are using the CAN FD communication bus?
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2answers
241 views

What do the dashed extended green lines on this PFD mean?

The most important source of information for the pilot is the PFD
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1answer
674 views

What does this A320 FCTM quote about cold weather and non-precision approaches mean? [closed]

Can someone explain this paragraph from the A320 FCTM about minimum temperatures for non-precision approaches? I can't understand it. COLD WEATHER OPERATIONS For all Non Precision Approaches, there ...
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1k views

Will the new Part 23 changes reduce the cost of avionics for existing aircraft?

Will the part 23 changes coming in August help to reduce the cost of IFR GPS avionics? I'm looking to upgrade the IFR avionics in a 1978 Cessna 182.
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1answer
89 views

What are the ASTERIX CAT010 message types 005 and higher?

I am analyzing some surface radar recording data under Asterix CAT010 category. The document from Eurocontrol shows that there are 4 standardized message formats under this category: 001 Target ...
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1answer
83 views

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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1answer
315 views

How much does an air data module cost?

Curious how much Air Data Module and Angle of attack sensor costs, such that is used on commercial airliners.
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434 views

What is the ambient temperature used in RTCA/DO 160?

I was going through RTCA/DO 160D for some work-related issue. I went through the whole document but nowhere does it define what the "ambient temperature" value is? In one place it defines +15 to +35 ...
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1answer
189 views

Does ARINC 825 (Aviation CAN bus) follow the same protocol as automotive CAN buses?

From what I can gather it is derived from the automotive industry standard CAN (Controller Area Network) bus, but I was wondering if they share the same protocols. If you took an automotive bus reader ...
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183 views

What's the difference between a Sole Means Navigation System and a Primary Means Navigation System? [closed]

For bonus points, how you define a supplemental means navigation system?

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