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Old 18th September 2021, 15:08
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pre65 pre65 is offline  
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Join Date: Jun 2009
Location: Ashen-North Essex/Suffolk borders.
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I've now found this explanation.

"69001 showed a ground earth fault indication approaching Somerhill Tunnel, it was reset and power restored but due to the train weight, 1788 tons, was unable to get underway on the incline, the control jumper between 66768 and 69001 was activated but sent spurious signals meaning neither loco was able to power up, it was later found that the jumper from 66768 was defective and that the fault indication received by 69001 was a ghost software indication, the good news from all that being 69001 had no real problem"
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