TRACTOR TRAILER FIRE – Jan 28th around 1000 hrs ccompany 7 and 15 units were dispatched to a tractor trailer fire on Interstate 81 in the area of mile marker 24. D/C 15 arrived on scene and reported one tractor trailer along the Interstate with nothing showing. Further investigation revealed that the truck had blow a motor. There was no fire. Command 7 then placed all units in service.