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-   -   Sheremetyevo Superjet 100 in flames (https://www.pprune.org/rumours-news/621198-sheremetyevo-superjet-100-flames.html)

gearlever 5th May 2019 18:29


Originally Posted by San Diego kid (Post 10463756)
Wow, that was painfull to watch how long firefighters needed to arrive.

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

andrasz 5th May 2019 18:49

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

jantar99 5th May 2019 18:53


Originally Posted by andrasz (Post 10463743)
IF rumors correct, there was NO in-flight fire, only electric failure and loss of comms due to a lightning strike. MLG collapsed on third touchdown after two bounces, fire broke out afterwards. Available video only shows the aircraft already on fire, sliding to a halt.

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

NutLoose 5th May 2019 19:00


Reports also suggest it did not succeed in its first emergency landing attempt.
https://www.bbc.co.uk/news/world-europe-48171392


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

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

Anvaldra 5th May 2019 19:01

Rumors they had “direct law”, so switched on 7700. Then the question to crash teams

paperHanger 5th May 2019 19:02


Originally Posted by jantar99 (Post 10463777)
I second this. Read similar rumors. Besides, Aeroflot stated that the fire started after touchdown.

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 ...

paperHanger 5th May 2019 19:04


Reports also suggest it did not succeed in its first emergency landing attempt.

Originally Posted by NutLoose (Post 10463779)


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.

pattern_is_full 5th May 2019 19:05

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

derjodel 5th May 2019 19:08


Originally Posted by pattern_is_full (Post 10463788)
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

andrasz 5th May 2019 19:11


Originally Posted by paperHanger (Post 10463781)
...you would have thought the fire crews would have been chasing it down the tarmac though?

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


gearlever 5th May 2019 19:16


Originally Posted by paperHanger (Post 10463722)
Odd that they flew a hold ...

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

KelvinD 5th May 2019 19:41

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

freshgasflow 5th May 2019 19:46

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.

Airclues 5th May 2019 19:46


An airport official said that ‘many passengers delayed emergency evacuation - because against all instructions - they were picking up hand luggage from overhead compartments.’
When is someone going to be prosecuted for this?

gearlever 5th May 2019 19:51


Originally Posted by freshgasflow (Post 10463818)
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.

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

But 99% are resettable. Okay 98%:O

liider 5th May 2019 19:57

Hard landing video, finally

tlott 5th May 2019 20:01

Video from onbaord during the landing.

twitter/Ozkok/status/1125122006674964480

A Squared 5th May 2019 20:09


Originally Posted by freshgasflow (Post 10463818)
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.

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.

alserire 5th May 2019 20:11


Originally Posted by Airclues (Post 10463819)
When is someone going to be prosecuted for this?

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.


jugofpropwash 5th May 2019 20:37

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...)


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