Definition
A technical illustration in which a portion of an object's outer surface is shown removed, exposing the internal components and their arrangement while keeping the rest of the object intact for reference.
Plain English
A drawing that shows what something looks like inside by 'cutting away' part of the outside, so you can see the inner parts without losing the sense of the whole object.
Context Anchor
Seen in aircraft textbooks, maintenance manuals, system descriptions, and training diagrams when the inside of a part cannot be seen from the outside.
Derivation
From 'cut away,' meaning to remove a section. The drawing literally shows part of the outer skin 'cut away' so the viewer can see what's underneath.
Why Pilots Care
Cutaway drawings are how pilots and mechanics learn what's actually happening inside engines, gyros, fuel systems, and other components they can't physically open up. Understanding the internal arrangement helps with troubleshooting, systems knowledge, and oral exams.
Intuition Check
A cutaway drawing is not a damaged part or an instruction to cut something open. It is a teaching picture that shows hidden inside parts.
Example Sentence 1
The training manual included a cutaway drawing of the magneto so students could see how the rotating magnet, coil, and breaker points work together.
Example Sentence 2
During systems training the instructor pointed to the cutaway drawing to explain the location of the hydraulic pumps inside the fuselage.