TL* THE CONTACT OWNS A 2015 FREIGHTLINER CASCADIA. THE CONTACT STATED THAT THE FUEL LINE BECAME LOOSE AND CAUSED A FUEL LEAKAGE AND FUEL FUMES TO EMIT INTO THE VEHICLE. WHILE ATTEMPTING TO UNHOOK THE TRAILER, FUEL SPLASHED INTO THE CONTACT'S MOUTH, CAUSING HIM TO LOSE CONSCIOUSNESS AND SUSTAIN SEVERAL INJURIES. THE CONTACT WAS TRANSPORTED TO THE HOSPITAL BY AMBULANCE. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE RESENDING FUEL LINE WAS NOT TIGHTENED CORRECTLY, WHICH CAUSED THE FAILURE. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS REPAIRED. THE FAILURE MILEAGE WAS 5,800.