Derailment at Ealing Broadway 2/3/2016 (and RAIB report) Mar 16, 2016 21:59:42 GMT
Post by Colin on Mar 16, 2016 21:59:42 GMT
London Underground has a one hour detrainment target so it did grab my attention when it was stated the train sat for an hour before starting the move. Looking at the internal information I can access, it was actually closer to 50 minutes. The liklihood is that service control were of the view that the train could be berthed in the platform within the magic hour target, and in any case the staff required to effect the detrainment would have already been utilised in securing the route; so I'd suggest that is why they chose to leave the passengers on the train.
Any time a train is being authorised past a red signal and points are involved the whole route a train is taking must be secure. Scotch & clip is one method and in this particular instance was the only method available. As it is now obvious there's no point hiding the fact that during this particular incident not all of the points involved in the route were correctly secured.
Other methods are Route Secure visual, illuminated A, route card working or route proving. Central line also has "white route locking". I won't cover those here as that is serious thread drift.
N.B. The above may NOT be correct for the modern rule books now in use!
For starters we use the London Underground rule book on London Underground metals........and in this particular location the sprung points were removed last year.
The problem was service control were using diagrams which still showed the old layout (and the sprung points) - of course that's very different to what is there now.