It appears the cab is the same as the rescues, hazmat 1 main unit and truck company's. With there being the problem with this particular unit I'm guessing something happened during the build and something is slightly out of spec. I am sure there is probably some back and forth on how it will be fixed and both sides not agreeing on how . This is just purely a guess but if it was just a windshield that's my guess. I would imagine that the current second piece is pretty worn down, the unit was one of the units donated after 9/11 and the main unit has bees replaced twice already I think. I'm sure they could use a backup second piece as well, does anyone know if the old second piece is still around? I know at one point they had a fully stocked reserve main and second piece as well as spare main piece. I think the reserve second piece was used as the spare for the second piece when it went down but I haven't seen it in awhile. I think it was a crew cab international very similar to squad 1's old TRV. I think I read somewhere that the old 2nd piece and the old TRV were originally purchased as salvage units but those units were disbanded or something.