Brand new 5th wheel-- blowout from the factory to the dealer

We were looking at RVs at the local dealer last weekend and noticed a new trailer with the siding damaged and the wheel opening skirt badly broken . Opened the door to look inside and there was what was left of the tire. Obviously a blow out with the tire grenading due to overheating, the tread had separated from the carcass. With no body damage and not having seen the original tire, there are just too many variables to blame the tire.