Thread: Northern Line this week
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Old September 21st 05, 02:59 PM posted to uk.transport.london
Clive Clive is offline
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First recorded activity at LondonBanter: Jul 2003
Posts: 523
Default Northern Line this week
In message .com,
writes
The normal testers only check that the tripcock is 1) in place, 2) in
gauge - the present problem was caused when a train was tripped
travelling at slow speed (not "in slow speed") and the tripcock
effectively reset itself, thus failed to operate the Tripcock Pressure
Switch which applies the brakes.

So it's a single train problem as once tripped the tripcock should stay
tripped until reset.
--
Clive
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