Questions tagged [accident-investigation]

Use only when final reports are released or for the process of investigating accidents. Questions inviting speculation or opinions are off-topic.

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18 votes
2 answers
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How is aircraft control positively transferred between pilot flying and pilot not-flying?

I am watching the video NTSB Animation Flight 1549 Hudson River Landing US Airways (Youtube) and at 0:36 in the video, after the bird strike, you see the following dialogue: ...
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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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34 votes
6 answers
9k views

Why can't the A320's computer-imposed limits be overridden?

Under the investigation section of US Airways Flight 1549, it is noted that [The pilot] asserted that insufficient credit was given to the A320's fly-by-wire design, by which the pilot uses a side-...
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18 votes
1 answer
5k views

Can flight data recorders be hacked?

In the event of a plane crash such as MH17, and the flight data recorders (FDR, a.k.a. "black boxes") are potentially in the "wrong hands", is it theoretically possible to: open the FDR and close it ...
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  • 623
23 votes
3 answers
2k 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 ...
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21 votes
4 answers
5k views

Why does it take months, sometimes years, for the BEA and NTSB to complete aviation accident investigations?

I'm aware that there is a lot that goes into an aircraft accident investigation, so I understand that the investigations take a long time for a reason. But what I don't know is what those reasons ...
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8 votes
2 answers
1k views

What steps have been taken to rule out instrument failure due to blocked static ports or pitot tubes?

In the case of Aeroperu Flight 603, a fatal crash was caused by duct tape that was accidentally left over some or all of the static ports on the underside of the fuselage after the aircraft was ...
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4 votes
1 answer
4k views

Is there less vertical space for an engine under the wing of a 737 Max than for an A320neo?

The source of this question is the understanding that the LEAP-1B couldn't fit under the wing of a 737 without changing its longitudinal position. But this wasn't the case with the design of the LEAP-...
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2 votes
1 answer
2k 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 ...
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2 votes
2 answers
172 views

Do airports have their own incident/accident investigation departments?

Do airports have their own incident/accident investigation departments? or they are restricted to the NCAA/Safety department only?
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  • 31
20 votes
5 answers
6k views

Why does the autopilot disengage even when it does not receive pilot input?

After having read the disturbing https://en.wikipedia.org/wiki/1999_South_Dakota_Learjet_crash I'm left with the question as to why the computer allows for the autopilot to be disengaged when there ...
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27 votes
2 answers
20k 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 ?
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25 votes
2 answers
9k views

Why was Pan Am Flight 103 flying over Lockerbie?

Pan Am Flight 103 was a flight from Frankfurt to Detroit with stops in London and New York. Why after taking off in London did it fly all the way to Lockerbie instead of going directly to New York? ...
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19 votes
2 answers
6k views

Why does the NTSB release transcripts of Cockpit Voice Recordings, but not the actual recordings?

From what I have read it is illegal for the National Transportation Safety Board to release Cockpit Voice Recordings, while they are allowed to release its transcripts. From AirDisaster: It is ...
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16 votes
2 answers
858 views

Do aircraft manufacturers like Airbus or Boeing charge the airline, when they assist in aircraft accident investigations?

Most of the time, when an aircraft crashes or has an accident, the manufacturer also assists in the investigation. Is this a pro-bono kind of effort on part of the manufacturers, or do they charge the ...
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14 votes
4 answers
2k views

Can computer imposed inputs be overridden on the Boeing 737-MAX?

During Lion Air Flight 610, a Boeing 737-MAX, it seems that the angle of attack sensors caused the software to believe the aircraft was stalling, thus initiating a nose-down pitch to recover from the (...
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14 votes
4 answers
9k views

Can the autopilot (or stall avoidance system?) of the B737 MAX 8 be overridden by sheer force?

A New York Times article from today about the Lion Air Flight 610 crash claims that in order to control the airplane the pilot could have braced his feet on the dashboard and yanked the yoke, or ...
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13 votes
2 answers
5k views

Why don't black boxes send a signal when above water?

Cockpit Voice Recorder and Flight Data Recorder's "Underwater locator beacons" only send their position when underwater. Why don't they do so when not underwater?
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17 votes
1 answer
1k views

Which commuter flight was forced to land in a cornfield in '96 or '97?

Last night a friend's wife was describing her experience as a child being on a flight that encountered a flock of Canadian geese, where at least one engine was lost to a bird strike. I suspect both ...
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14 votes
2 answers
3k views

Is there any disadvantage to having the de-icing system on?

I was watching Mayday S11E02 about West Caribbean airways flight 708 and the pilots turned off the de-icing system partway through the flight. It's not why it crashed, but I was curious as to if there ...
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12 votes
1 answer
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 ...
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11 votes
3 answers
3k 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 ...
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  • 3,956
4 votes
1 answer
978 views

Why could these aircraft not prevent total hydraulic failure?

Then have been three incidents (UAL232, JAL123 and DHL 00-DLL) where damage to an aircraft resulted in complete loss of hydraulics. Only one of them managed to make it down safely using differential ...
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2 votes
2 answers
224 views

If an accident were to occur at a cross-border airport, who would investigate?

In the Wikipedia article Canada–United States border, there are several airports mentioned where the airport straddles the US-Canada border, in some cases the runway even being partially in the United ...
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  • 723
0 votes
3 answers
1k views

Why is there no alert if shutting down a running engine during flight? [duplicate]

In reference to Flight 235, there is a lot of speculation going on today, and since the flight recorders' data indicate that the running engine was shut down manually, everyone is suspecting that ...
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  • 5,951
-1 votes
3 answers
751 views

Did AF447 cross dangerous weather?

question Did the Air France 447 pilots endanger the passengers by not diverting around but flying straight through the weather system encountered and pictured below ? Or was this a defendable, ...
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  • 3,284
14 votes
1 answer
1k views

How could a failed left wing cause a roll to the right?

The crash of Continental Express flight 2574 in 1991 (see also this question) was caused by faulty maintenance to the de-icing boot on the left horizontal stabilizer. This became detached in flight, ...
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13 votes
2 answers
5k views

Do fighters have black boxes?

Or is it just commercial aircraft? I was watching an episode of Scorpion where an "F-120 Firehawk" crashed and they looked at its black box. So, do normal, non-imaginary fighters have them?
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  • 2,096
12 votes
4 answers
37k views

Could a pick up truck save a plane with failed landing gear?

I recently saw this fictionalized video. While it's not real, I do wonder if this could be possible, even if not the best way to handle the situation.
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10 votes
2 answers
558 views

Is there a Cockpit Video Recorder?

Often we hear about Cockpit Voice Recorders, but are there video recorders?
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10 votes
1 answer
1k views

How did flight 2574 break up?

My understanding of Continental Express flight 2574 is that a de-icing boot on the horizontal stabilizer of the EMB120 was missing screws and therefore detached, leading to the tail separating. I ...
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6 votes
1 answer
446 views

How does EMAS reduce damage in case of an aircraft overrun?

I saw a report about Mike Pence's plane overrun today on Twitter link: Mike Pence plane overrun photo on Twitter. As can be seen there is huge cracks and breaking of the runway but the plane was ...
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  • 995
3 votes
2 answers
739 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?
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  • 1,149
3 votes
3 answers
544 views

Why not increase the number of Flight Data Recorders and add jettisoning capability?

With some Flight Data Recorders gone unrecoverable during crashes , what's the argument for not changing their locations, like wings or engines? Given their utility after accidents, why not increase ...
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2 votes
1 answer
278 views

What does the preliminary report on the Ethiopian B737 MAX accident show? [closed]

In early April the Aircraft Accident Investigation Bureau of Ethiopia released a preliminary report on the crash of Ethiopian Airlines flight 302 that happened on March 10, 2019. There apparently is ...
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  • 569
1 vote
1 answer
423 views

Did the First Officer of Ethiopian Flight 302 trim in the wrong direction? [closed]

Looking at the accident report of Ethiopian Airlines Flight 302, it says the cut out switches were used. But the manual trim moved from 2.3-2.1? My reasoning for asking this is because the timeframe ...
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