The question is whether or not it is economicaly feasible to do so. A real bad fire will melt all the wiring, destroy gaskets, melt automation controls, ect. Not to mention damage caused by the water used to put out the fire.
Most likely cause, without actually knowing, is that the fire was started by a broken fuel line. I've seen the results of a fuel line breaking and spraying fuel on a hot turbo charger. Not pretty.
With that many people on a ship, they are lucky no one died.