Definition
In aviation electrical and electronic work, the condition of an electrical circuit being unbroken, so that current can flow from one end of the circuit to the other through all intended conductors, connectors, and components.
Plain English
An unbroken electrical path. If a circuit has continuity, electricity can travel all the way through it without being stopped by a break, a loose connection, or a burned-out component.
Context Anchor
Seen in aircraft maintenance and troubleshooting when a mechanic checks wiring, switches, connectors, fuses, or lights with a test meter.
Derivation
From the Latin continuus, meaning 'uninterrupted' or 'joined together.' In electrical use, it keeps that core idea: the circuit is joined together end to end with no break in the path.
Why Pilots Care
A break in continuity can cause failure of critical systems like radios, lights, or ignition.
Analogy
Think of a simple extension cord. If the wire inside is unbroken from plug to socket, it has continuity. If the wire is cut inside the cord, the path is broken and electricity cannot reach the device.
Intuition Check
Continuity does not just mean "keeping something going" in a general sense. In aircraft electrical work, it means the electrical path is complete and unbroken.
Example Sentence 1
The mechanic checked continuity across the landing light wiring and found a break near the wing root.
Example Sentence 2
A lack of continuity in the ignition circuit prevented the engine from starting.