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Have you ever seen sparking power lines outside of movies? Power lines don't normally spark, unless there is something seriously wrong with them.

I've seen them spark, but only in wind conditions which would themselves already be impossible for an airship to fly in.

Yes exactly, we are doing a preventive maintenance solution. So we fly whenever possible to assess the condition of the power line.

Lines?

No.

Relays and transformers?

Yes.