This specification covers the design@ procurement and test requirements for 3000 PSI hose assemblies for use in aircraft pneumatic systems. Classes: Hoses will be listed under two categories. Class I : Oil resistant Class II: Non-oil resistant Class I hose assemblies shall be internally resistant to MIL-H-5606@ MIL-H-6082@ MIL-L-26087@ and other common mineral based lube@ hydraulic@ and compressor oils. Both classes shall be externally resistant to fuels@ lube and hydraulic oils@ ozone@ oxygen and other general atmospheric conditions.