Yep.
They had already declared emergency.....

RT now reporting 13 fatalities confirmed. The wording implies that the toll could rise.

I second this. Read similar rumors. Besides, Aeroflot stated that the fire started after touchdown.

https://www.bbc.co.uk/news/world-europe-48171392


https://cimg7.ibsrv.net/gimg/pprune....acd5eb5b7b.jpg

from https://ria.ru/20190505/1553277937.html

Fair enough, you would have thought the fire crews would have been chasing it down the tarmac though? I've had that before now, for far less important events, including an icident at Coventry that is probably best forgotten ...

I would ignore that, that will be some half-assed journalist studying the FR24 track and mistaking the hold for a missed approach (that BBC article mentions FR24, so thye probably looked) .. they are not very bright.

Did that Yakutia gear collapse produce a fuel leak? I see moisture and possible foam on the tarmac.

It did!

"The aircraft failed to stop on the remaining runway and overran onto the area that was under reconstruction, stopping after 250 meters. This caused damage to the forward fuselage, separation of both main landing gear bogies and a fuel tank leak."

https://aviation-safety.net/database...?id=20181010-0

Absolutely. There is zero justification for their 90+ second absence.

I have watched the FR data again and it looks to me they were too high/fast for the first approach.

Re the 7700 squawk; the replay I just watched showed they were actually squawking 7600.

Faraday cage
 

I am not an aviation professional so grateful if someone could explain things to me:
If the theory of lightning strike are true, how does it lead to electrical failure ? I thought that an aircraft aluminium or metal mesh composite effectively created an Faraday cage ?
If there were local electrical transients, would this only trip circuit breakers. which presumably could be reset quickly ?
Thank you.

When is someone going to be prosecuted for this?

Not circuit breakers, but FMC failures, generator failures,spurious warnings etc. etc.

But 99% are resettable. Okay 98%:O

Hard landing video, finally

Well, it's not that simple. Lightning generates very large currents. I don't know anything about the specific's of the Sukhoi electrical system, but many aircraft electrical systems are single wire, chassis ground systems like an automobile. In those, lightning generating a large current in the airframe, is the same as the lightning generating a large current within the electrical system ... with the resulting possibility of overcurrent damage to critical components. Even in electrical systems whcih do not use the airframe as a conductor, the fact that you have large current transients in the airframe, adjacent the wiring, can lead to burned insulation, induced voltage spikes within the conductors, and other effects that may result in damage to critical components. As far as breakers are concerned, they are designed to protect from excessive current flowing through the normal path of the electrical circuit. A lightning strike may not trip them, it may be causing damage on components in a way that there is no excessive current flowing through the wiring at the breaker panel.

When it's made a criminal offence.

Then try and prosecute someone for it and see how it goes going after people who behave irrationally in an emergency.

We all know what we'd do when watching it on YouTube. Whole different ball game in the middle of it.

Given that there was a "bounce" that was apparently hard enough to start a substantial fuel leak, I wonder if overhead bins opened and spilled luggage? If bags fell and were blocking the aisle, I think there would be a strong temptation to grab and pitch out the open doorway simply to get them out of the way. (Although that doesn't explain the people calmly rolling their bags away...)

Ugh. Not good news, but not surprised. When I first saw the video and the reports of all surviving, I thought ... seems unlikely. No satisfaction in seeing that my initial reaction is correct.

Aluminum does a good job of conducting the lightning current, however there can be significant 'induced' current on internal wiring (similar to the way a transformer works - current through the external windings induce a current to the internal windings). However, this should be designed for per 25.1316:(note, the quote is the FAR, however the regulation has been harmonized so the EASA CS version should be identical - and to export the Superjet they'd have to show compliance with the FAR/CS)
There is a lengthy Advisory Circular that provides specifics on how to show compliance.
In short, critical systems can not be significantly affected by the lightning transient, essential systems can be affected but must self recover (with no resetting of circuit breakers). The allowable recovery time depends on the system, but 10 seconds was a good rule of thumb.

So the short answer is that a lightning strike should NOT have resulted in widespread system failures.

At the moment we do not really know if it was a lingthning strike, it is only speculation (though not unsubstantiated). From what is definitely known, aircraft first squawked 7600 about 7 minutes into the climbout, stopped the climb and returned to land, changing to 7700 about 6 minutes prior to touchdown. What happened next is on video... Closeup photos clearly show slats/flaps deployed (to about 25), aircraft was configured for a normal landing.

Hard to make any further judgment until we know what controlability issues the crew had to tackle. It could be a badly blotched landing with a perfectly controllable airplane, or an outstanding feat of airmanship in face of adverse circumstances.

Looking at the images, hopefully the flight deck crew have survived which will help the investigation.

Both Captain and FO are fine for sure (local media says they are being questioning by authorities now)

Cabin video after touchdown. Different from tlott's one.

Terrifying footage from inside the cabin here - https://www.youtube.com/watch?v=KwTpGLKPFXI&feature=youtu.be

Full uncut video of the first 5 minutes:
00:20 Aircraft comes to a stop
00:30 First slide deploys
01:51 First Fire truck arrives
02:13 Last evacuation on slide
02:50 RH cockpit crew evacuates using rope
03:30 Crew member climbs back to plane on slide
03:47 Smaller and larger dark objects slide down slide
03:55 Crew member slides down slide

It appears that after that last crew member slides back down at 03:55, there is still someone in the doorway who goes back inside. I don't see them come out, unless they use the slide on the other side. On watching again, it looks like that last crew member then runs around to check the slide on the other side, but no luck.

From the cabin passenger video, there is an alert signal on the cabin intercom, so it would appear not *all* the electrical circuits are dead.

It is Russia, someone has to pay for the bad publicity, they either have heroes, or someone goes to jail ... there seems to be no middle ground.

Full investigation of all AC losses
 

This crash is too similar to the last one in 2018 with MLG collapse. And the first AC loss due to CFIT also had electrical failure, hadn't it? It's time for a full investigation of SSJ accidents. This AC is a menace to society. Poor families that lost their members. Rest in peace.

​​​​

I don't see flames until second bounce. Do others here agree?

If its in direct law then likely a handful, and we don't know exactly what systems that were down or why, so lets not rush to judgement on flying skills or otherwise.

What is truly sad is the mis-reporting, the video evidence clearly shows it wasn't on-fire on approach, and its a consequence of the bounce causing a puncture/rupture of the wing fuel tanks.

Reports here now that 41 fatalities.. sad indeed. :(

Much is up for debate wrt this accident. All except for the veritable AGE it took for ARFFS to get onsite.

When I see the people running with their large luggage, it makes me furious. How many more could have been saved if it wasn't for some selfish morons, we will never know.

Apparently they had lost COMs, so I am guessing the reasons the fire services was so slow was that there had not been any communication from the aircraft as they came in for landing.

Does anybody know what the fire service rescue reaction time should be at an airport like this? Or what level of RFFS it is at this airport?
Someone should have spotted that burning aircraft on approach and raised some alarms you would have thought.

The landing may have been hard enough to break off the gear and the dislodged gear which rupture the fuel tanks. The videos so far posted show only the latter part of the landing slide out.

The first issue is why the hard landing and then to work the before and afters from that.