I saw a video where the lineman was actually left on the line by the pilot (hanging in some kind of rescue harness), then retrieved when the work was done. He c

I saw a video where the lineman was actually left on the line by the pilot (hanging in some kind of rescue harness), then retrieved when the work was done. He could move along the line using it like a zipline. I guess it depends on the malfunction and the way it's solved; an overheated line connector is not something you want to touch or hang on. Not sure what they do if the line to be fixed is not the one on the top (fixing one of the lower lines would mean the helicopter interferes with the upper lines).