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3 of 4 thruster packs experienced the issue; they need 2 of 4 to open the solar panels and 3 of 4 to dock with the ISS. From what I understand they got all 4 working again using the "water hammer" effect to clear the blockage, but I'm not sure how accurate that is.

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Imagine it's your job to fiddle around remotely with fuel pump electronics (or whatever may create that water hammer) within a time window of maybe 20 minutes or else you've just sunk a 100M investment somewhere in the ocean. Must be lots of fun o.O

There's plenty of excitement for me just tweaking a live production server, not sure my heart could cope with what you just described.

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