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SYSTEM TESTING
Flexible line connectors - 14020_94

Aviation Structural Mechanic E2 - How airplanes are built and how to maintain them
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high-temperature insulation (fig. 3-3) to protect aluminum structures and electrical lines near the ducting. Bellows assemblies are manufactured for two functions. The tolerance compensator (fig. 3-4) can be adjusted in length and allows for easier removal and replacement of the bleed-air duct. The thermal compensator (fig. 3-5) allows for thermal expansion throughout the bleed-air ducting. To support and brace the ducting, flexible mounting brackets are used (fig. 3-6). The use of these and other types of support brackets will vary with location and type of duct used. Air- conditioning distribution lines are manufactured from aluminum alloy and are subjected to relatively low pressures and temperatures. Figure 3-3.—Bleed-air ducting. Figure 3-4.—Tolerance compensator. Figure 3-5.—Thermal compensator. Figure 3-6.—Flexible mounting brackets. 3-8







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