AMT 125 FLUID LINES Flashcards
Certain tolerances are permitted to allow for very minor
defects in tubing.
RIGID PIPES
Metal tubing installed in hydraulic systems should be free from
_____, _____, _____, _____, or any other defect, which
will either limit the flow of fluid or lead eventually to tube
failure.
scratches, dents, nicks, wrinkles
It is resistant to attack by hydraulic fluid Teflon hoses
have certain characteristics which must be taken into
account when handling them.
FLEXIBLE HOSE
are used to secure the various lines to the
airframe or power plant assemblies.
Support clamps
The fitting consists of three parts: a fitting, a sleeve, and a nut.
FLARELESS TUBE FITTINGS
It must be remembered that hydraulic fluid under high
pressure can cause considerable injury or damage if suddenly
released through the failure of a tube or fitting.
RIGID PIPES
When exposed to high pressure and temperature,
Teflon tends to assume a _______
permanent ‘set’
Several types of ______ are used for this purpose.
support clamps
The flareless tube fitting consists of three parts: a ____, a _____, and a _____.
fitting, sleeve, and nut
When _____ is removed with the intention of
re- installing it, support the hose in its installed shape.
Teflon hose
For hydraulic systems in which a pressure of ______ psi will be
exceeded, corrosion-resistant (_______) or ________ is often used.
1,500, stainless steel, titanium tubing
The fitting itself is designed in a number of different shapes to provide for a variety of installations.
FLARED- TUBE FITTINGS
When flare fittings are to be used, the tubing should be flared with a tool designed for the purpose.
The standard angle for the flare is ______
37 degrees
In other parts of the system, such as the ______ and the
______, ______ is used.
return lines, pump supply line, aluminum-alloy tubing
IS A TYPE OF A HOSE
DEFORMATION
Permanent set
For portions of a hydraulic system between parts of
the airplane where there is relative movement and
possible vibration, _______ is required.
Flexible hose
are assemblies for joining sections of tubing in a system and to hydraulic accessories.
TUBE FITTINGS
What will you see in a flared-tube fittings:
37 degrees flare body, flared tube, sleeve, nut
For example, we may find straight fittings, T-fittings, elbow fittings, and cross fittings, all in the same
system.
FLARED-TUBE FITTINGS
The most commonly used fittings are the standard ____ fittings, and _____ fittings.
AN-type fittings, flare less fittings
This may require using a support wire.
Flexible hose
The metal tubing used in hydraulic systems must be of
sufficient strength to withstand the pressures to which it may
be subjected.
RIGID PIPES
is widely used because of its superior
qualities.
Teflon hose
is pressed tightly against the flare cone by means of the sleeve and the nut.
tube flare
are finding wide application in aircraft plumbing
systems.
MS (Military Standard) flareless-tube fitting
is used for flared tubing and must include a body, sleeve, and nut for the complete
assembly.
AN-fitting
The tube flare is pressed tightly against the ______ by means of the sleeve and the nut.
flare cone
Using this type fitting eliminates all tube flaring, yet provides a safe, strong, dependable tube
connection.
FLARELESS TUBE FITTINGS
An AN-fitting is used for flared tubing and must include a ____, _____, and _____ for the complete
assembly.
body, sleeve, nut
in aircraft are often identified by markers made up of color codes, words, and geometric
symbols.
Fluid lines
These markers identify each line’s function, content, and primary hazard. In the illustration, various color
codes and symbols used to designate the type of system and its contents.
Fluid line-identification
is used to secure lines in areas not subject to
vibration.
plain clamp
A Teflon-cushioned clamp is used in areas where the
deteriorating effect of ______, hydraulic fluid (MIL-0-5606),
or fuel is expected.
Skydrol 500
is used to secure lines subject to
vibration; the cushioning prevents chafing of the tubing.
rubber-cushioned clamp
However, because it is less resilient, it does not provide as good
a vibration-damping effect as other cushion materials.
Support clamps
is used in areas where the
deteriorating effect of Skydrol 500, hydraulic fluid (MIL-0-5606),
or fuel is expected.
Teflon-cushioned clamp
are the most commonly used
clamps.
rubber-cushioned and plain
When a hose is removed with the intention of reinstalling it;
support the hose in its installed shape that may require using a support wire
Fluid lines in the aircraft are often identified by markers made up of the following:
Color codes and words, geometric symbols
What materials should be used for hydraulic fluid system which exceeds 1500 psi of fluid pressure?
Stainless steel, titanium steel
which of the following is used to secure lines subject to vibration and chafing?
Rubber - cushioned clamp
Body, sleeve and nut is considered to be an assembly for?
AN - Fitting
What effect could be caused by scratches, nicks, dents, wrinkles and etc. on hydraulic fluid lines especially on rigid pipes?
It can either limit the flow of fluid or lead eventually to tube failure.
is used in areas where the deteriorating effect of skydrol 500 or fuel is expected.
Teflon - cushioned clamp
For portions of a hydraulic system between parts of the airplane where there is relative movement and possible vibration;
Flexible hose is required
Which of the following is considered to be one of the most commonly used fittings?
AN fitting and Flareless fittings
Is used to secure lines in areas not subject to vibration
Plain clamp
Which type of hose material is being widely used because of its superior quality?
Teflon hose
What is the standard angle for the flare?
37 degrees
The deformation of a flexible hose due to high pressure and temperature is known as?
Permanent set
