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TSO-C53 for Fuel and Oil Hoses • Type A - Non-fire resistant "normal" temperature hose assemblies which are intended to be used in locations outside fire zones where the fluid and ambient air temperatures do not exceed 250 degrees F. Rubber hose assemblies. • Type B - Non-fire resistant "high" temperature hose assemblies are intended to be used in locations outside fire zones where the fluid and ambient air temperatures do not exceed 450 degrees F. Teflon hose assemblies. • Type C - Fire resistant "normal" temperature hose assemblies which are intended to be used in locations within fire zones. Rubber hoses with firesleeve. • Type D - Fire resistant "high" temperature hose assemblies which are intended to be used in locations within fire zones. Teflon hoses with firesleeve. • Type 1 (pressure Line) - Hose assemblies which are intended to be used in line connecting the feathering pump outlet to the propeller. • Type 2 (supply line "fire resistant") - Hose assemblies which are intended to be used in line connecting the oil supply to the feathering pump where this entire line is located aft of the firewall. • Type 3 (supply line "fireproof") - Same as Type 2 except hose assemblies are located wholly or in part forward of the firewall. TSO C75 for Hydraulic Hoses