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Author Topic: Train hits fallen signal between Reading and Newbury - 17 November 2014  (Read 42732 times)
SandTEngineer
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« Reply #60 on: March 31, 2015, 15:09:27 »

....err, here is another one to add to the list (Cantley, Sunday 29 March 2015).  Think the RAIB (Rail Accident Investigation Branch) might be extending their investigation a bit Roll Eyes Undecided Shocked

« Last Edit: March 31, 2015, 18:12:46 by SandTEngineer » Logged
Electric train
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« Reply #61 on: March 31, 2015, 18:39:28 »

....err, here is another one to add to the list (Cantley, Sunday 29 March 2015).  Think the RAIB (Rail Accident Investigation Branch) might be extending their investigation a bit Roll Eyes Undecided Shocked



Is that what the S & T call a lower quadrant  Grin

I can see a whole load of ultrasonic testing and or cctv being done to quite a number of hollow tubular signal posts
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Starship just experienced what we call a rapid unscheduled disassembly, or a RUD, during ascent,”
eightf48544
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« Reply #62 on: March 31, 2015, 20:34:35 »

Does this count as NFN. (Normal for Norfolk!)
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SandTEngineer
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« Reply #63 on: April 01, 2015, 11:24:13 »

I can see a whole load of ultrasonic testing and or cctv being done to quite a number of hollow tubular signal posts
In my time in S&T (Signalling and Telegraph) maintenance you hit the post with a hammer.  If your ears rang and you got covered in bird poo you knew the post was OK.  If the hammer made a big hole and you got covered in rust and flaking paint you knew you were in (big) trouble  Roll Eyes Tongue Grin
« Last Edit: April 01, 2015, 19:56:59 by SandTEngineer » Logged
TonyK
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« Reply #64 on: April 02, 2015, 20:41:41 »

In my time in S&T (Signalling and Telegraph) maintenance you hit the post with a hammer. 

I used a similar approach in testing window panes, until the glazier I worked for went bust.
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Now, please!
bobm
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« Reply #65 on: April 02, 2015, 22:21:52 »

But you had a smashing time until then.  Grin
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Chris from Nailsea
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« Reply #66 on: April 02, 2015, 23:07:33 »

....err, here is another one to add to the list (Cantley, Sunday 29 March 2015).  Think the RAIB (Rail Accident Investigation Branch) might be extending their investigation a bit Roll Eyes Undecided Shocked



I reckon that was the work of badgers - look how they've tried to hide the result of their excavations.  Wink Cheesy Grin
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William Huskisson MP (Member of Parliament) was the first person to be killed by a train while crossing the tracks, in 1830.  Many more have died in the same way since then.  Don't take a chance: stop, look, listen.

"Level crossings are safe, unless they are used in an unsafe manner."  Discuss.
Adelante_CCT
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« Reply #67 on: September 23, 2015, 13:05:00 »

Corroded signal post apparently

http://www.itv.com/news/meridian/update/2015-09-23/train-crash-caused-by-corroded-signal-post/
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bobm
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« Reply #68 on: September 23, 2015, 13:55:52 »

Full RAIB (Rail Accident Investigation Branch) report here

https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/462405/R152015_150923_Newbury.pdf
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Chris from Nailsea
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« Reply #69 on: September 23, 2015, 20:10:36 »

Purely for completeness in this topic, here is the summary from that Rail Accident Investigation Branch (RAIB (Rail Accident Investigation Branch)) report:

Quote
Summary

At about 14:35 hrs on Monday 17 November 2014, a train travelling at 110 mph (177 km/h) struck the top of a signal which had collapsed and fallen across the railway line near Newbury. The signal post completely obstructed one track and partially obstructed a second (the one on which the train was travelling). There were no injuries and the train did not derail, but it did sustain some exterior damage. The outcome could have been much more serious if the first train to encounter the signal had been travelling at speed on the line that the signal had completely obstructed.

The signal collapsed because the base of the post, which was of hollow tubular steel construction, had corroded through, causing an almost complete loss of wall thickness at and just above ground level. Corrosion had occurred to both internal and external surfaces; internally because water had entered the post and there was no drainage for it to escape, while the external corrosion was affected by the base being buried in ballast, which held water around the base and damaged the protective coating on the signal post.

Signal posts are subject to annual visual examinations, but the examinations of this signal did not detect the problem because the main area of corrosion was hidden by ballast, and the examinations regime was vulnerable to missing such defects. A separate examination in 2012 for a resignalling project in the area also did not detect the defect for similar reasons. Because the defect was not detected, it was not subsequently reported and remedied through maintenance.

The investigation also identified possible underlying factors associated with the management of ballast levels around post bases, competence management of structures examiners and corporate knowledge about the original design specifications for signal structures.

The RAIB has identified one learning point and made five recommendations. The learning point relates to the process for conducting visual examinations on structures such as signal posts. Four of the recommendations are addressed to Network Rail and cover the management, examination and resilience of signal structures to such failures. The remaining recommendation is addressed to Amey regarding its competence management arrangements for structures examiners.
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William Huskisson MP (Member of Parliament) was the first person to be killed by a train while crossing the tracks, in 1830.  Many more have died in the same way since then.  Don't take a chance: stop, look, listen.

"Level crossings are safe, unless they are used in an unsafe manner."  Discuss.
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