Definition
A training aid consisting of an actual or replica component with portions of its outer casing removed or sectioned to expose the internal parts, allowing students to see how the inside of the device is constructed and how it operates.
Plain English
A real or model part with the outside cut open so you can see what's inside and how it works.
Context Anchor
Seen in aviation ground instruction when an instructor shows how an aircraft part, engine part, or system is built inside.
Derivation
From the plain English act of 'cutting away' material to reveal what lies beneath. The hyphenated noun form is used as a teaching-aid label: the thing that has had part of it cut away.
Why Pilots Care
Lets students visualize internal mechanisms of engines, magnetos, or instruments without access to the actual operating hardware.
Intuition Check
A cut-away is not a shortcut or a procedure. In this context, it means a teaching object with part of the outside removed so the inside is visible.
Example Sentence 1
The instructor used a cut-away of a piston engine to show how the valves open and close as the crankshaft turns.
Example Sentence 2
Students studied the cut-away of the alternator to understand the path of electrical current through the brushes.