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https://www.newcivilengineer.com/latest/train-derails-and-crashes-into-concrete-barrier-near-newcastle-depot-22-03-2022/ (https://www.newcivilengineer.com/latest/train-derails-and-crashes-into-concrete-barrier-near-newcastle-depot-22-03-2022/)

Edited to show the photos at full size.

It needs to be made VERY clear that the train was ECS/Out of service at the time

Well, whatever happened there? A lot of heads are being scratched over it, some of them even unsure which way the train was going!

I've seen one thing presented as fact, and inside information: that the train missed a signal and forced trailing points against it. We also have the pictures, and if you look at the bottom one of the set you can see a distinct wiggle in the track just this side of what would be the facing points after the adverse trailing ones.

That's enough to put together a narrative, in which the first four vehicles get through the trailing points largely on the track (i.e. following OK), but the fifth derails to the right. That might be due to just a lower axle loading, or maybe a bit of train of track jammed in the flangeway - or something else. The train takes the left track at the following facing points, but the derailed final vehicle can't. As the two tracks separate the coupling bar pulls at an increasing angle, though as it is nearly 2 m long this unconventional mode of progress can cope with tracks some way apart.

There is an increasing side force on those two vehicles, which drags the track into that wiggle, and then the fifth vehicle gets pulled across its track to follow its mates. I doubt that it would topple at this point, but by now there is s significant level difference between the two tracks. There is a concrete retaining wall at the step, which appears to have had a cable duct made of concrete slabs built into its top (though it's so wrecked you can't really see). There is also a steel handrail, which got flattened.

The left side wheels of vehicle five dropped below those on the right, which canted it over, but the interaction with the wall and the track below it kept the train from jumping down the step. It must have been making a dreadful noise for the last few metres!

Or something like that. Since it was in a depot, RAIB may not be too bothered over this one. But my guess is that they may be quite interested in how the driver came to make that error (assuming that bit is true as reported).

Location shown between concrete container site and the double building opposite

That concrete looks like signal cable troughing. If it is and in use,  there is going to be extensive damage in that department too.

I believe it's a raised walkway for access to train cabs.

You could easily damage the bogie mountings doing that sort of thing.

Ah…   ;D

I hope Hitachi remembered to take a swipe off Trans-Pennine's credit card before they leased it out to them!

Three things

1)just wondering if one of the concrete slabs COULD have been dislodge while the train was going by,causing the unit off the rail.

2) Why does the media go on about chaos,it was one train in a siding.

3) Chaos was when on a sunday morning the metro trains could not get out of the depot in Newcastle as the only way out was blocked.

I think it was due to over head power line being pulled down

This video (https://youtu.be/U5OwGfYHdDo) shows the retaining wall that 802207 got half on top of, but only at the start and a bit at the end since the point of the video is 180105 which mostly blocks your view. That answers (1), as clearly that train didn't derail with a jump two feet upwards and sideways too.

That is the "Sidings Line" - the main access route to Newcastle station for DMUs. There is another access at the other end, but it means reversals and no doubt units are parked in the wrong order. Hence it took a while to get all the stock out and into service. Whether you think that explains (2), given a bit of the usual over-reporting of any "chaos", is up to you.

As to why the "step" has been built up with concrete slabs, that's still not clear. Since this isn't a stabling road it's hard to see why access to cabs would be required. But it doesn't look a good place to put cables either.

Any ideas whether the units are repairable or will have to be scrapped?

Is there any way of telling which way the train was moving?
Although it looks like the power car was trailing with the "RED LIGHTS" to the rear,
the lights could have been changed from white to red to show "the incident"

I’m putting my money on the TPE unit attempting the same move the GC 180 made in the video, and for some reason the last car has gone along the wrong line at the points.  I wouldn’t like to guess the reason.

Paul

Can't see any "hand points" just wondering if some one had pulled the hand points a bit early,
 and the last vehicle started to go down a different set of rails.

Hand points can usually be run-through without damage

It's where they are connected to a lever frame, point locks, or point motor that run-throughs cause damage.

The Neville Hill derailment made me think: 'OK, low speed impact, but that Azuma, its carriages and couplings really haven't made a good fist of staying in line very well, the couplings don't seem to adequately constrain lateral movement of carriages with respect to each other and the second, third and fourth carriages each ended up with a wheelset derailed.'

It made me hope that this behaviour isn't replicated the day one of these trains running at high speed receives a check of similar force as a result of a more trivial impact, as it's generally a good thing if carriages do not derail, and a good thing that should they do so, everything stays reasonably in line - especially on a route with electrification masts. (and was it Hatfield that caused people to ask 'Could electrification masts be designed to be less aggressive should they be impacted?)

And then this. Do Northern's variant have similar couplings?  Very different cause but again that last carriage has become remarkably misaligned with the rest of the train.

The Neville Hill RAIB report is here: https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/935941/R132020_201118_Neville_Hill.pdf

One of the recommendations being:

LNER, with support from Hitachi, should assess the risk associated with derailment of an IET following collision at low speeds, and take any necessary actions to demonstrate an acceptable risk. It should take into account the likelihood of occurrence of a derailment...

I wonder if that study has concluded, what its findings might have been and whether they've been made public.

Mark

Transpennine Express, not Northern.

It’s apparently been lifted back onto the tracks today using a couple of those big Kirow rail cranes.  Pictures in railukforums.

Paul