CHAPTER 10
HOSE AND TUBING FABRICATION AND
MAINTENANCE
HOSE AND HOSE ASSEMBLIES
INTRODUCTION
You are responsible for maintaining a portion of the
LEARNING OBJECTIVES: Identify the
hundreds of feet of fluid and air lines and various
various types of hose and hose assem-
hardware and seals found in modern-day aircraft. The
blies. Identify hardware, tools, equipment,
maintenance of these lines frequently involves
maintenance practices, and age control
fabrication and replacement of hose/tubing assemblies.
requirements for naval aircraft. Recognize
To be able to select the proper type of hose and tubing
maintenance practices for hose and hose
and their hardware, you will need a basic knowledge of
assemblies.
the type, size, and material from which items are to be
Hose assemblies are used to connect moving parts
made. Hose and tubing assemblies are used to transport
with stationary parts and in locations subject to severe
liquids or gas (usually under pressure) between various
v i b r a t i o n . H o s e a s s e m b l i e s a r e h e av i e r t h a n
components of the aircraft system. Hose and tube
aluminum-alloy tubing and deteriorate more rapidly.
assemblies are used in aircraft for fuel, oil, oxidizer,
They are used only when absolutely necessary. Hose
coolant, breathing oxygen, instruments, hydraulic, and
assemblies are made up of hose and hose fittings. A
vent lines. You must be familiar with the procedures for
hose consists of multiple layers of various materials.
testing and fabricating hose and tubing assemblies, and
An example of the hose most often used in
you must recognize the various tools and equipment
medium-pressure applications is shown in figure 10-1.
and how to identify the different uses of hose and tubing
in naval aircraft.
Figure 10-1.--Medium pressure synthetic rubber hose, MIL-H-8794.
10-1
