Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [cockpit-voice-recorder]

A Cockpit Voice recorder (CVR) is one of two "black boxes", used to record audio in the cockpit for the purpose of investigation of accidents and incidents.

18
votes
2answers
5k views

Where can I listen to the actual cockpit voice recorder audio from US Airways Flight 1549? [duplicate]

I have searched for the audio recorded on the CVR from the US Airways Flight 1549, but all clips and audios I found seems to be audio recorded from the flight control and not from microphones inside ...
7
votes
3answers
438 views

How to find black boxes underwater absent any pinger signals?

If CVR/FDR cannot be seen visually on the seafloor (because covered by a thick layer of mud/sediments) and no pinger signals are detected, how can they be found? Metal detectors? Any other methods? ...
5
votes
1answer
99 views

Detecting faults in CVR mic inputs

Years ago my father worked for Eastern Airlines out of Miami (that should give you a timeframe) and he was an electrical engineer. I recall once he told me that the pilots (one or more) used to ...
5
votes
1answer
363 views

What is the meaning of HOT-1, HOT-2, CAM, etc., in cockpit voice recorder transcripts?

When reading the the written down recordings of CVR like here, for instance, it is common to see abbreviations like HOT-1, HOT-2 or CAM. I guess that CVR records multiple channels and the codes ...
11
votes
1answer
282 views

Do FDRs & CVRs (black boxes) have an in-service life span?

Do Flight Data Recorders (FDRs) and Cockpit Voice Recorders (CVRs), aka black boxes, have an in-service life span? Is it necessary to replace them over time? If so, are there any regulations ...
2
votes
1answer
699 views

Why doesn't the black box also record video? [duplicate]

Why does the black box still only record the cockpit's audio today, rather than also recording video of the cockpit? Wouldn't a video of the pilots' actions and what they were seeing outside the plane ...
10
votes
1answer
353 views

Are CVR and FDR reset after every flight?

Recording the thousands of parameters and voice conversations must take a huge amount of storage, and so I am wondering, how frequently is this data "deleted", so it can be used again? For example, ...
3
votes
1answer
272 views

What is the smallest aircraft to have a CVR / FDR?

I was wondering what is the smallest aircraft to have a CVR (Cockpit Voice Recorder) and/or FDR (Flight Data Recorder)? Small single engine prop can sometimes have the avionics, like the G1000, that ...
2
votes
1answer
204 views

Why aren't the CVR and FDR required to store data for a longer period? [duplicate]

I'll be honest I don't know a lot about the brand new airplanes, but one think I do recall a lot of from reading accident reports is that they typically only recorded the last 30 minutes of data. ...
7
votes
1answer
317 views

What was the first aircraft fitted with both an FDR & CVR?

What was the first production aircraft to be fitted with a Flight Data Recorder (FDR) and Cockpit Voice Recorder (CVR) as standard by the manufacturer?
-1
votes
1answer
238 views

Why do black boxes seem so outdated? [duplicate]

Now that the Malaysian flight was again in the news, that they had officially given up and stopped searching, this issue comes to mind again. Why do w all depend on finding a physical recorder, and ...
14
votes
2answers
2k views

Why are cockpit voice recorders limited to 2 hours recording?

With today's technology in memory storage, where simple voice recorders can record virtually endless durations, why are CVRs limited to only 2 hours. Is it the eternal "cost vs benefit" reason? ...
0
votes
1answer
243 views

Was there any Hawker Trident installed cockpit voice recorder before BEA Flight 548 incident?

After BEA Flight 548 incident in June 1972, all British-registered airliners have mandatory cockpit voice recorders. The TV series Mayday claimed no voice recorders were installed in Hawker Tridents ...
2
votes
1answer
238 views

In what manner does the Cockpit Voice Recorder timestamps?

See here the transcript of ending moments of Aeroflot Flight 593 . The Wikipedia writes : (N.B.: All timestamps refer to the flight data recorder time, not GMT or local time.) What do 2265,2266......
11
votes
3answers
2k views

How does a CVR / FDR determine when to stop recording?

For example, the CVR records only about 2 hours of data. Overwriting important data must be avoided, and thus the recorders should know if a catastrophe has happened. Then they can stop recording (to ...
9
votes
2answers
2k views

Are military aircraft required to have black boxes?

In the United States, the FAA requires certain types of aircraft to have a Flight Data Recorder (FDR) and/or Cockpit Voice Recorder (CVR). I understand these regulations to apply mostly to civil ...
6
votes
2answers
328 views

Can noise from the passenger cabin be picked up by the cockpit voice recorder?

How sensitive is the cockpit voice recorder? Can it pick up sounds from the passenger cabin?
12
votes
3answers
3k views

How can the breath of a pilot be recorded?

On a plane, as a passanger, I can't hear my own breath. I can't hear my own breath even in a silent room. On a plane, there is a continous background noise. And the microphone recording the noises ...
1
vote
2answers
640 views

Are plane's black boxes essentially useless tool in the modern age and how to improve upon it? [duplicate]

I am just reading the latest news on the air plane crash that happened couple days ago and it dawned on me that one too many times have I read a story on the NY Times where after black box is obtained,...
12
votes
1answer
2k views

Where inside a black box is the data storage located?

In a news article I saw this picture of a black box from a crashed A320. The article mentioned that finding the black box had lead to some disappointment due to the black box having been damaged: ...
4
votes
2answers
1k views

What is the form of information stored in black box?

Black boxes contain the information regarding to a flight. What is the form of those information? Any particular language log?
2
votes
2answers
460 views

How do airlines (or the government) retrieve information from the black box of an aircraft?

When black-boxes are found, how is the information retrieved from within the data storage? Is there a special kind of device used for this?
7
votes
2answers
994 views

After a crash, does the information stored on flight recorders have expiration dates?

After the recent announcement of the recovery of the flight recorders of AirAsia flight were recovered, I was wondering if black boxes deteriorate after a set amount of time. As of now, nothing of ...
16
votes
4answers
7k views

Why are flight recorders generally located in the tail?

Is there a particular reason why FDRs and CVRs and associated similar bits of equipment are kept in the tail section of a plane?
2
votes
1answer
757 views

If we add a video recorder in the cockpit to complete FDR/CVR, will we add a blackbox? [closed]

The introduction of a video recorder in addition to the current audio and flights parameters recorders used for crash investigation (CVR and FDR) is suggested by this article (published in the New ...
20
votes
3answers
1k views

Why are FDRs and CVRs still two separate physical devices?

Given the histories of flight data recorders and cockpit voice recorders, I somewhat understand their origins as two separate physical devices. Given their separate tracks of development, regulatory ...
6
votes
3answers
905 views

How can the CVR from a Cessna 560XL only contain old records and none from the fatal accident?

Is it possible that the CVR from a Cessna 560XL is just showing old records and nothing from the fatal accident when the plane crashed? I´m talking about the airplane crash in Brazil, where a ...
1
vote
2answers
450 views

Can airplanes transmit/relay flight data to ATC's periodically while in flight? [duplicate]

The flight data recorder is one important piece of information in the event of a crash. Can this information not be transmitted or relayed to the ATC's while the flight is air borne so that they don't ...
1
vote
1answer
176 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.
23
votes
2answers
15k views

Why is the FDR and CVR put into water again after a water crash?

When a plane crashes in the water and the investigator team looks for the FDR and CVR, why do they put it in a container of water when they find it ?
12
votes
3answers
2k views

Where are the microphones for the black box located in the cockpit?

All modern commercial airliners have a CVR (Cockpit Voice Recorder) on-board to record what the pilots are saying during the duration for a flight. I feel that the location of the microphones is ...
7
votes
3answers
2k views

How much data do FDR and CVR generate on commercial jets?

I'm wondering about how much CVR and FDR data an A320 (for example) would produce and at what intervals. I believe that there are 4 or 5 voice channel and several sensor data things. I'm trying to ...
4
votes
1answer
704 views

Does the NTSB provide CVR audio recordings alongside transcripts in accident reports?

Reading the NTSB's accident report on US1549, there is a transcript of the CVR from page 149 onwards in the PDF (marked as page 130 on hardcopy). Small clips of the ATC/crew communications exist, but ...
9
votes
1answer
880 views

Do flight recorders need more efficient antennas?

At a frequency of 37.5 kHz, a quarter wavelength is about 2 km (1.24 miles) long. How does the black box efficiently radiate anything if it is not attached to 2 km of antenna?
12
votes
1answer
4k views

How much water pressure can flight recorders withstand?

How deep can black boxes go under water and how much pressure can they withstand while under water before they get crushed? I'm a layman in terms of aviation, so if it's not too much to ask, can you ...
27
votes
6answers
36k views

Why are FDR's called “black boxes” when they are actually orange?

Why do they call flight data recorders a "black box" if it's orange in color? Just curious about this since I've seen several images of black boxes but they all come in orange colors, and not black. ...
18
votes
6answers
17k views

Why don't black boxes have their own GPS?

In too many cases of unfortunate incidents, hunting for FDR (or CVR also) is a major challenge.1 There are many or all answers recorded on that device. Why a locator (GPS linked) cannot be included ...
3
votes
1answer
757 views

Why don't they have two black boxes? [duplicate]

Why is it that black boxes don't float? From what I gather the answer is: So they will not float away from a water crash site. The ping can be heard underwater with sonar. Finding the ping, finds ...
15
votes
4answers
8k views

How close do you have to be to an underwater black box to detect it?

The news keeps talking about the black boxes on aircraft that end up in water, and one thing that keeps coming up is the underwater locator beacon that transmits a signal for 30 days if it gets wet. ...
9
votes
2answers
840 views

How is data transmitted to CVR and FDR?

A recent news item mentioned that "black boxes" are typically stored in the tail section of an aircraft to maximize their odds of surviving a catastrophic incident. If they're stored in the rear of ...
2
votes
2answers
280 views

Is it possible for the sensors which determine when an aircraft has landed in water to become damaged?

A plane has sensors that should transmit data back somewhere when it hits water correct? Is it possible that these can be turned off/damaged?
3
votes
2answers
700 views

What happens to the transponder, FDR and CVR in case of an explosion?

Will the above mentioned equipment still work and transmit data/location information if an explosion occurs inside the aircraft?
20
votes
1answer
4k views

Do aircraft manufacturers produce their own black boxes?

Do the manufacturers who build airplanes use their own "black boxes" in the planes, or are there companies whose sole purpose is to develop black boxes? For example, in 2010 in the Airblue Flight 202 ...
16
votes
4answers
10k views

Like transponders, can flight data recorders be turned off?

I never knew much about airplanes before the tragic incident of Malaysia 370. I have been spending a lot of time on Twitter reading various articles and investigations; in one of the articles I read, ...
40
votes
1answer
12k views

Do flight recorders float in water?

In a recent BBC article regarding the disappearance of Malaysian Airlines Flight 370 (MH-370), the writer refers to a US Naval officer's statement: Commander William Marks from the US Seventh Fleet,...
11
votes
1answer
8k views

Which aircraft are required to have a black box?

When is an aircraft required to have a Cockpit Voice Recorder or a Flight Data Recorder?