Aircraft EWIS Wiring, Components and Inspection Procedures
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EWIS: Definition and Components
EWIS
EWIS refers to wires, wiring devices, and combinations of these. EWIS includes the termination devices installed in any area of the aircraft whose purpose is the transmission of electrical energy between two or more termination points. These EWIS wires and associated components are treated as an airplane system.
It is important to know that EWIS doesn't include avionics, portable electrical devices, electrical equipment, or fiber optics. EWIS includes the following:
- Wires and cables
- Bus bars
- Termination points and electrical devices, including those on relays, interrupters, switches, and circuit breakers
- Connectors and connector accessories
- Electrical grounding and bonding devices
- Electrical splices
- Materials used