FAA Advisory Circular 43.13-1B
Acceptable Methods, Techniques, and Practices
Aircraft Inspection and Repair
AC 43.13-1B | 9. Aircraft Systems and Components | 2. Hydraulic Systems | 9-30. Hydraulic Lines and Fittings
9/8/98 RIGHT WAY
WRONG WAY
AC 43.13-1B
Do not bend or twist the hose as
illustrated.
Allow enough slack in the hose line
to provide for changes in length
when pressure is applied. The
hose will change in length from
+ 2% to – 4%.
Metal end fittings cannot be con
sidered as part of the flexible por
tion of the assembly.
The use of elbows and adapters
will ensure easier installation and in
many installations will remove the
strain from the hose line and
greatly increase service life.
FIGURE 9-9. Proper hose installations.
At all times keep the minimum
bend radii of the hose as large as
possible to avoid tube collapsing.
Par 9-30
Page 9-23