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You are here: Home / Airframe / Aircraft Electrical System / Wiring Installation – Wiring Diagrams

Wiring Installation – Wiring Diagrams

Filed Under: Aircraft Electrical System

Wiring Diagrams

Electrical wiring diagrams are included in most aircraft service manuals and specify information, such as the size of the wire and type of terminals to be used for a particular application. Furthermore, wiring diagrams typically identify each component within a system by its part number and its serial number, including any changes that were made during the production run of an aircraft. Wiring diagrams are often used for troubleshooting electrical malfunctions.

Block Diagrams

A block diagram is used as an aid for troubleshooting complex electrical and electronic systems. A block diagram consists of individual blocks that represent several components, such as a printed circuit board or some other type of replaceable module. Figure 9-107 is a block diagram of an aircraft electrical system.

Figure 9-107. Block diagram of an aircraft electrical system.
Figure 9-107. Block diagram of an aircraft electrical system. [click image to enlarge]
 

Pictorial Diagrams

In a pictorial diagram, pictures of components are used instead of the conventional electrical symbols found in schematic diagrams. A pictorial diagram helps the maintenance technician visualize the operation of a system. [Figure 9-108]

Figure 9-108. Pictorial diagram of an aircraft electrical system.
Figure 9-108. Pictorial diagram of an aircraft electrical system. [click image to enlarge]
Schematic Diagrams

A schematic diagram is used to illustrate a principle of operation, and therefore does not show parts as they actually appear or function. [Figure 9-109] However, schematic diagrams do indicate the location of components with respect to each other. Schematic diagrams are best utilized for troubleshooting.

Figure 9-109. Schematic diagram.
Figure 9-109. Schematic diagram. [click image to enlarge]

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