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  • Chapter 9: Fluid Lines & Fittings › Connection & Torque

    Rigid Tubing Installation and Inspection Before installing a line assembly in an aircraft, inspect the line carefully. Remove dents and scratches, and be sure all nuts and sleeves are snugly mated and securely fitted by proper flaring of the tubing…

  • Chapter 14: Aircraft Fuel Systems › Fuel System Components › Fuel Lines & Fittings

    needed. Replace all aircraft fuel lines and fittings with approved replacement parts from the manufacturer. If a line is manufactured in the shop, approved components must be used. Several installation procedures for fuel hoses and rigid fuel lines exist. Hoses ... wires to a fuel line. When separation is not possible, always route the fuel line below any wiring. If a fuel leak develops, it does not drip onto the wires. Metal fuel lines and all aircraft fuel system components need…

  • Chapter 9: Fluid Lines & Fittings › Steel

    Rigid Fluid Lines Tubing Materials Copper In the early days of aviation, copper tubing was used extensively in aviation fluid applications. In modern aircraft, aluminum alloy, corrosion-resistant steel, or titanium tubing have generally replaced copper tubing. Aluminum Alloy Tubing ... hard) or 3003 H14 (1⁄2-hard) is used for general purpose lines of low or negligible fluid pressures, such as instrument lines and ventilating conduits. Tubing made from 2024-T3, 5052-O, and 6061-T6 aluminum alloy materials…