Hose assemblies must be proof pressure tested after fabrication. Ballistic and oxygen hose assemblies must be cleaned and tested by qualified aviation equipment personnel in accordance with NAVAIR 13-1-6-4 before installation in weapons systems.

Observe all safety rules when you proof pressure test hose assemblies, and proceed as follows to proof pressure test hose assemblies. Clean hose assembly.

Table 5-3.Alternate Cleaning Fluids for Teflon Hose or Hose Assemblies

Select test media from table 5-4. Select proof pressure. See table 5-5, which is a section of the typical hose assembly proof pressure test data sheet. Test one hose assembly at a time. Several hose assemblies that require the same proof pressures may be tested together, if they are connected in series with adapters.

Unless otherwise directed, a manifold hose assembly that contains different sizes or types of hose will be tested at the lowest proof pressure required by any one size or type contained in the manifold. Arrange hose assemblies as close to the horizontal position as possible. Allow trapped air to escape when testing hose assemblies in a liquid test medium. When testing an air or gas medium, test hose assemblies underwater so that trapped air can escape from the hoses braided outer covers. Hose assemblies with a firesleeve do not require the underwater test. Tighten the pressure cap. Apply proof pressure for a minimum of 30 seconds, but no longer than 5 minutes. Check leakage while maintaining proof pressure.

After the completion of the proof pressure test, drain the hose assembly and clean. Install the protective closures. Install the identification tag. Prepare the hose assembly for installation or storage.