They have to have a third party since this is Westinghouse gear.
The reason I asked the first question is I talked to a factory rep for a different company and he told me that you get a fire going in that gear and every thing gets hot and then the FD comes in and sprays it with cold water and that could damage the bus or if they use dry chemicals there could be some dielectric issues. Also there was carbon dust all over everything including the spacers and the cobwebs that were in there and of course that could cause a fault path. Wires that need to be megged out because of the damage the heat can do to the insulation.
Theres just way more to it than "I replaced everything that looked bad".
I had one where the panel was on the garage and of course they had a fire iside the garage and they couldn't figure out why I would just heat the panel back up so that they could get started rebuilding it, they kept saying the panel looks fine. I had them get the panel checked out and sure enough the bake lite or plastic or whatever it was behind the bus bars had been damaged by the heat and had melted a hole in it.
Everyone just wants to put this thing back together and like everyone keeps asking we're not even sure why it went "boom" in the first place.
Like they say, sometimes you have to do what's right and not what's popular.