| Aircraft Fluid Lines and Fittings | 12 |
INTRODUCTION
All aircraft depend upon a number of systems to provide vital functions for operation. Fuel, oxygen, lubrication, hydraulic, instrument, fire extinguishing, air conditioning, heating, and water systems all require fluid lines. The malfunction of these systems due to fluid-line failure seriously jeopardizes the aircraft’s safety.
The pressure of the fluids in fluid lines varies from very low, 5 to 10 pounds per square inch (psi) [34 to 69 kPa] for an instrument system, to as much as 5000 psi [34.450 kPa] for a hydraulic system. Low-pressure fluid lines may be made of plastic or rubber hose. High-pressure fluid lines are made in a variety of materials, including aluminum alloy, stainless steel, ...
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