My guess would be that this figure also includes costs for downtime and the like, but that's just a guess. Would be interested to see a more detailed breakdown of the $400k.
It's the same with things like outages, an outage lasting a day may "cost" $1 million, but what's actually meant is that you missed $1 million in profits for the day, not that you had to pay $1 million. If operating a carrier costs $400k/day then you could say then fixing something for a day "costs" $400k, but that's kind of a simplistic way of putting it.