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Post by jamesb on Mar 8, 2008 22:08:23 GMT
I was at Kings Cross this afternoon, and a 'not in service' 73TS pulled in. It was announced "this train has been taken out of service because of defective safety equipment".
In car 3, one of the double doors was partially open, and the orange light was lit up on that car. There was a member of staff in the carriage presumably guarding anybody from coming through the half open door at stations where it was on the platform side.
I was trying to imagine the system for closing the doors, and couldn't understand how one door of the double set could be shut but the other half open... I concluded somebody could have jammed something in the mechanism? But the doors must be quite versatile to survive many years of rush hours. Also I didn't think the motors would work if the orange light was on? Or at least I imagined that that the train would operate at a reduced speed if it was possible to override it. But the train accelerated out the platform (I think normally) with the door half open... (thankfully for me, otherwise I would never have got home!)
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Post by setttt on Mar 8, 2008 23:00:14 GMT
I was at Kings Cross this afternoon, and a 'not in service' 73TS pulled in. It was announced "this train has been taken out of service because of defective safety equipment". In car 3, one of the double doors was partially open, and the orange light was lit up on that car. There was a member of staff in the carriage presumably guarding anybody from coming through the half open door at stations where it was on the platform side. I was trying to imagine the system for closing the doors, and couldn't understand how one door of the double set could be shut but the other half open... I concluded somebody could have jammed something in the mechanism? But the doors must be quite versatile to survive many years of rush hours. Also I didn't think the motors would work if the orange light was on? Or at least I imagined that that the train would operate at a reduced speed if it was possible to override it. But the train accelerated out the platform (I think normally) with the door half open... (thankfully for me, otherwise I would never have got home!) If a train has a defective door which cannot be closed, the train is withdrawn from service and an assisting member of staff is required to travel in the affected car to ensure customers do not attempt to board through the open door. In order to move the train, the train operator must cut-out (override) the door interlock. This does not limit the speed of the train, however the train must not be driven faster than 15mph through stations. As to the door mechanism, on 73 stock the two individual doors in a double set are independent and are not worked by the same door engine, so a problem with one wouldn't normally affect the other.
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Post by Deleted on Mar 8, 2008 23:21:28 GMT
As to the door mechanism, on 73 stock the two individual doors in a double set are independent and are not worked by the same door engine, so a problem with one wouldn't normally affect the other. The door engines are also mounted vertically in the 73ts because of the large stand back areas did not allow the engines to be mounted underneath the nearest seat.
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