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  • Chapter 4: Engine Ignition & Electrical Systems › Bonding & Grounding › General Bonding & Grounding Procedures

    torques for all types of terminals. Figure 4-115. Repairing broken wire by soldering and potting. Figure 4-116. Connecting terminals to terminal block. Bonding & Grounding Bonding is the electrical connecting of two or more conducting objects not otherwise connected ... adequately. Grounding is the electrical connecting of a conducting object to the primary structure for return of current. Primary structure is the main frame, fuselage, or wing structure of the aircraft. Bonding and grounding connections are made in aircraft electrical…

  • Chapter 9: Aircraft Electrical System › Small Single-Engine Aircraft › External Power Circuit

    External Power Circuit Many aircraft employ an external power circuit that provides a means of connecting electrical power from a ground source to the aircraft. External power is often used for starting the engine or maintenance activities on the aircraft ... typically consists of an electrical plug located in a convenient area of the fuselage, an electrical solenoid used to connect external power to the bus, and the related wiring for the system. A common external power receptacle is shown…

  • Chapter 9: Aircraft Electrical System › Large Multiengine Aircraft › AC Power Systems

    early Boeing 747, employ a parallel power distribution system. During normal flight conditions, all engine-driven generators connect together and power the AC loads. In this configuration, the generators are operated in parallel; hence the name parallel power distribution system ... parallel system, all generator output current must be phase regulated. Before generators are connected to the same bus, their output frequency must be adjusted to ensure the AC output reaches the positive and negative peaks simultaneously. During the flight, generators…