MIL-DTL-26521L
4.6.3.13 Cleanliness inspection (see 3.9). A hose assembly when inspected for cleanliness shall
meet the requirements of 3.9; the following details shall apply:
a. Both ends of the hose assembly shall be visually inspected to determine if caps or plugs are
installed at the fittings.
b. The caps or plugs shall then be removed and a light source shall be placed at one end of the
hose assembly.
c. The interior of the hose shall be visually examined, without magnification, from the opposite
end of the light source. If the length of the hose assembly precludes this, then examination
shall be from one end of the hose assembly.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the
contract or order (see 6.2). When packaging of material is to be performed by DoD or in-house contractor
personnel, these personnel need to contact the responsible packaging activity to ascertain packaging
requirements. Packaging requirements are maintained by the Inventory Control Point's packaging
activities within the Military Service or Defense Agency, or within the Military Department's System
Command. Packaging data retrieval is available from the managing Military Department's or Defense
Agency's automated packaging files, CD-ROM products, or by contacting the responsible packaging
activity.
6. NOTES
(This section contains information of a general or explanatory nature which may be helpful, but is not
mandatory.)
6.1 Intended use. The military unique hose assemblies covered by this specification are intended for
use in exceptional fuel servicing of aircraft with aromatic hydrocarbon aviation fuel and require strict
adherence to military requirements. Exceptional fuel servicing is defined for this specification as hot
refueling and fueling of passenger aircraft with passengers on board. The hose assemblies will be used
on pantographs, hydrant systems and fuel servicing mobile equipment where the 225 psi (1.6 Mpa) rated
maximum working pressure includes peak surge pressure. These hose assemblies meet the strict
flexibility test requirement at -40 °F (-40°C) and 225 psi (1.6Mpa), which complies with detailed military
requirements.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a. Title, number and date of this specification.
b. PIN (1.2).
d. Additional marking (3.7.2).
e. Quantity required.
f. Torque data from low temperature flexibility test, if required (4.6.3.7).
h. Lot records if required (4.3.1).
i. Name and address of the first article inspection test facility to which first article samples are to
responsible for conducting the first article inspection program (see 6.3).
j. Shelf life requirements (see 6.4).
k. Packaging requirements (5.1).
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