VEHICLE DESCRIPTION: TRANSIT BUSES AND BUS SHELLS. SOME BRAKE LINE HOSES MAY HAVE BEEN MANUFACTURED USING HEATER HOSE MATERIAL INSTEAD OF BRAKE LINE HOSE MATERIAL. HEATER HOSES ARE NOT APPROPRIATE FOR USE AS BRAKE LINES BECAUSE THE OPERATING PRESSURE OF THE BRAKING SYSTEM IS MUCH HIGHER THAN THAT OF THE HEATING SYSTEM.