Questions tagged [accident-investigation]

The investigation of aviation accidents or incidents. Questions requesting available factual information are welcome. Questions inviting speculation or opinions are off-topic.

22
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5answers
8k views

Is this one of the engines from the 9/11 aircraft?

I ran across an interesting set of post-9/11 photos and I noticed this picture in particular: The closest item on the truck looks a bit like an airplane engine, but I can't tell for sure. Is it one ...
2
votes
1answer
118 views

What is an “aeronautically qualified witness”?

Many older NTSB AARs, in their history-of-flight-and/or-accident-sequence sections, make mention of observations by an “aeronautically qualified witness” or witnesses, without any further explanation ...
1
vote
1answer
271 views

How much data is stored in the flight data recorder per hour in a typical flight of an A380?

One drawback or impediment to the storage of flight recorder data on the cloud is the amount of data that'd be transmitted and at cost. How much data in GB or TB is stored in the flight data recorder ...
10
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2answers
271 views

Is there a Cockpit Video Recorder?

Often we hear about Cockpit Voice Recorders, but are there video recorders?
2
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1answer
209 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 ...
0
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1answer
130 views

Is it normal ops to dispatch an airplane after a stick shaker was on throughout the previous flight (Lion Air 610)? [closed]

I've been studying Figures 5 and 7 of the Lion Air interim report and cannot understand why the airplane was dispatched on the "Loss-of-control" flight when the Left stick-shaker was on throughout the ...
0
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1answer
216 views

Smoking in the cockpit - how is this tracked?

A finding in the final report of US-Bangla Airlines Flight 211 crash is that the captain was smoking in the cockpit during the flight (page 46, section 3.1.2 e of the final report). My questions are: ...
2
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1answer
198 views

Which was the last Boeing crash that didn't send its black boxes back to the US?

I couldn't find an answer online, so I am asking the community. The real question is how frequent it is for a Boeing crash not to send the black boxes back to the USA, and a reply to title's question ...
4
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1answer
598 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-...
4
votes
1answer
489 views

Why is Germany not able to read data from the Boeing 737 MAX black boxes?

It is my understanding that Germany stated it does not have the capacity to read the new software, declining Ethiopia's request: "The French announcement resolved uncertainty over the fate of the ...
0
votes
1answer
355 views

Why is Boeing being blamed for the recent 737 Max crashes? [closed]

Boeing has received more than 5,000 orders for the aircraft, it has delivered 350 so far and only 2 of them have crashed. That's not a very high crash rate. The FAA, until just a day ago, was very ...
2
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1answer
228 views

Could the autopilot have rectified the flight path without any crew input on the Aeroflot Flight 593?

In the case of the Aeroflot Flight 593 air crash, could the autopilot have rectified the flight path of the Airbus at any point if the crew had not attempted to correct the spin, even while partially ...
9
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1answer
667 views

How unusual is the 737 MAX 8's crash history?

The Boeing 737 MAX 8 is getting a lot of bad press at the moment, but people's instincts when it comes to probability are generally terrible, especially when it comes to risk assessment. Compared ...
1
vote
1answer
288 views

Why wasn't the Boeing 737 grounded in 1991 after a crash's cause remained unknown? [closed]

Why weren't 737-200s (and other variants): grounded immediately after UA 585 crashed, out of precaution and risk avoidance? The crash's cause was unknown then. remained grounded in 1992, after the ...
0
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1answer
141 views

Did factors specifically related to the concorde design influence the Air france flight 4590 crash?

This youtube video partially attributes the retirement of all concorde fleets to the airfrance flight 4590 crash: Were the factors in this accident due to the ...
1
vote
1answer
317 views

Was the 1992 Gimli DHC-4 Caribou accident ever investigated?

On August 27, 1992, 3 people were killed when a de Havilland Canada DHC-4 Caribou crashed immediately after takeoff at Gimli Industrial Park Airport. Wikipedia describes the accident as follows: ...
2
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1answer
1k views

Which military aircraft does this seem to be? [F-16 vs MiG-21]

Can someone identify the aircraft based on the components, riveting style, or other technical details visible in these crash pictures? a) Based on publicly available details, the chief suspects are ...
26
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4answers
13k views

Why didn’t the Captain of Cathay Pacific flight 780 shut down engine 1 and land with a more reasonable speed?

In the approach phase, engine 1 of Cathay Pacific flight 780 got stuck at about 70% N1 and it forced the crew to do an overspeed landing (230knots). Why didn't they shut it off by turning the fuel ...
3
votes
1answer
187 views

Who was the US military pilot who crashed his plane and was accused of selling it to the Russians?

There was recently news regarding a story of a former US military pilot who crash landed his plane somewhere in the southwest. He was accused of flying the airplane to Mexico to deliver it to the ...
0
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2answers
153 views

What's the exact moment were the spoilers are supposed to be deployed on a A320?

Are they deployed when the levers are pulled back to 'IDLE' or only when pulled back to 'Reverse'? I still can't figure out, 12 years after, why flight TAM JJ3054 crashed into a gas station and a ...
8
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1answer
287 views

Are there countries where not all plane crashes are investigated (even if deadly)?

background information I was struck by the news of this deadly plane crash on 20 Dec 2018 which claimed 8 lives and apparently is not investigated as the plane and its potential survivors were not ...
-2
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3answers
246 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, ...
1
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0answers
164 views

Where can I find official information about a recent crash in Mexico?

I have heard about a helicopter crash involving an Agusta A 109 in Mexico, that seems to be causing some turmoil due to the deaths of a newly-elected governor and her husband. Is there any info about ...
13
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4answers
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 (...
7
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3answers
517 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? ...
0
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1answer
321 views

How to refute this geometrical method to find MH370? [closed]

A geometrical method to find MH370 has been published on the Net (see images below). I am sure it is wrong (because if it were that easy, thousands of people would have had this idea back in 2014). ...
2
votes
1answer
74 views

What do “azimuth window” and “compass switch” refer to in this accident report?

I recently read the accident report on BEA 548, but I'm unsure of some technical terms used on p. 4 of the report (p. 14 of the linked PDF): Apart from the probability that in the particular ...
14
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4answers
8k 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 ...
7
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2answers
1k views

What has Airbus done to address the dual input issue?

There have been a couple of fatal incidents involving Airbus aircraft, namely Indonesia AirAsia Flight 8501 and Air France Flight 447, that could have been prevented had the captains orders / input ...
4
votes
1answer
202 views

Does the NTSB ever not follow up a preliminary report?

Two years ago, there was a fatal crash in Fredericksburg, VA in which 6 people died in a Beech 95-B55. For some reason, the story struck me, and I wrote a note to myself to follow up on it. The NTSB ...
5
votes
3answers
281 views

What is the identity of this abandoned, wrecked Sudan Airways airliner?

The other day, I was browsing Twitter, when I came across this picture of an airliner posted by a Sudanese local (thought it was a Boeing 737, but a friend of mine pointed out that it was an Airbus ...
23
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3answers
2k views

Can this aircraft wreckage be identified?

I live in Salinas (central coast California) and there’s an old plane wreck (located within the boundaries of Toro Park County Park in a remote section). On a hike yesterday, we located and took some ...
7
votes
1answer
347 views

Why did the propellers not fail to the feathered position in the Atlantic Southeast Airlines Flight 2311 Crash?

In the ASA Flight 2311 crash the failure of a quill resulted in the loss of propeller pitch control. The propellers ended up with a pitch angle of 3 degrees which caused reduced thrust and increased ...
1
vote
1answer
189 views

Are there examples of passengers' Micro SD cards or USB flash drives surviving crashes?

Are there any well-documented cases of Micro SD cards or USB flash drives surviving 100% hull loss crashes? I'm asking about cards held by passengers, not ones that are part of the aircraft's systems.
3
votes
2answers
403 views

Has a scheduled passenger flight ever stalled because of shifting cargo?

Has any scheduled commercial passenger - not cargo - flight ever experienced a stall due to cargo shifting, like the National Airlines Flight 102 did, back in 2013? Please note I am specifically ...
35
votes
6answers
7k 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-...
2
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3answers
449 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 ...
22
votes
1answer
3k views

Why do chunks of aircraft debris float?

In reading about various theories of what happened to flight MH370, there's a lot of discussion about it possibly crashing into the ocean, breaking up, and pieces of the aircraft floating hundreds of ...
2
votes
1answer
275 views

Can someone identify this crash?

I watched an episode of Air Crash Investigation or something else a while ago, I want to know which one this was: What I know is that during takeoff, the aircraft received a warning saying some part ...
5
votes
1answer
238 views

Did Hamilton Sundstrand Corporation fix this GPWS problem?

So I was reading about Garuda Indonesia Flight 152 and one of the reason it crashed was for a GPWS malfunction. Here is the Wikipedia article about the crash and GPWS: Garuda Indonesia Flight 152 ...
1
vote
1answer
77 views

Any script to plot multi axis FDR / flight-test data (such as the ones used in air crash investigation)?

I am looking for a script or tool to create flight test and/or FDR plots with several vertical axis, such as the ones used in aircraft accident investigations. Does anyone have any hint on a MATLAB ...
1
vote
1answer
144 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 ...
21
votes
3answers
11k views

How could the Helios 522 passengers have survived so long without oxygen?

I've noticed some strange inconsistencies regarding the documentation of Helios Airways Flight 522. So first: Autopsies on the crash victims showed that all were alive at the time of impact But ...
2
votes
1answer
1k 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 ...
12
votes
1answer
364 views

Why was the FDR of flight ET409 extracted from ocean transported dry instead of in water?

I was more than sure that FDR (as good as any other electronic device including magnetic strip, i.e. HDD), after sitting for a few days under the sea or ocean, must unconditionally be transported wet (...
0
votes
4answers
527 views

How come nobody survived Air Moorea 1121, yet other people have survived crashes from altitudes more than 90x higher?

Air Moorea 1121 crashed from no more than 400 feet, yet people have survived far more awful disasters, such as UA232 or JAL123.
6
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1answer
192 views

Where can I find a worldwide General Aviation incident/accident ocurrence reports database?

I enjoy reading reports about aviation incidents and accidents. There are often interesting technical details and I believe that this practice increases the safety of my flights. To keep up to date I ...
6
votes
1answer
701 views

Was John F. Kennedy Jr.’s accident airplane equipped with an autopilot?

JFK Jr.’s crash was attributed to failure to maintain control due to spatial disorientation. Could this be explained by his Piper Saratoga N9253N having no autopilot?
-3
votes
1answer
277 views

Why do ATC displays use flight data sent by the aircraft they are tracking?

Why does ATC use data coming from an aircraft itself instead of using the readings from the airport radar? Also could Aeroperú 603 have been saved if the pilots had ignored the pitot static altitude ...
4
votes
2answers
617 views

Is it standard procedure to unlatch the cockpit door before an emergency landing in a small aircraft?

I was watching an Air Safety Institute video called "Real Pilot Story: Cemetery Crash – A near-death experience with valuable lessons for all pilots." It discusses a situation where a 1958 Bonanza ...