Fluid Lines and Fittings (Aviation Maintenance Technician Handbook FAA-H-8083-30A Audiobook Ch.9)

Aviation Maintenance Technician Handbook FAA-H-8083-30A Audiobook Chapter 9 Fluid Lines and Fittings
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Chapter 9 Fluid Lines and Fittings Introduction Aircraft fluid lines are usually made of metal tubing or flexible hose.
Metal tubing (also called rigid fluid lines) is used in stationary applications and where long, relatively straight runs are possible.
They are widely used in aircraft for fuel, oil, coolant, oxygen, instrument, and hydraulic lines.
Flexible hose is generally used with moving parts or where the hose is subject to considerable vibration.
Occasionally, it may be necessary to repair or replace damaged aircraft fluid lines.
Very often the repair can be made simply by replacing the tubing.
However, if replacements are not available, the needed parts may have to be fabricated.
Replacement tubing should be of the same size and material as the original tubing.
All tubing is pressure tested prior to initial installation and is designed to withstand several times the normal operating pressure to which it is subjected.
If a tube bursts or cracks, it is generally the result of excessive vibration, improper installation, or damage caused by collision with an object.
All tubing failures should be carefully studied and the cause of the failure determined.

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