Definition
A nondestructive inspection method in which a part is exposed to a beam of X-rays and the radiation that passes through is recorded on film or a digital detector. Differences in material density, thickness, and internal structure produce variations in the image, allowing inspectors to detect cracks, voids, inclusions, corrosion, and other internal flaws without disassembling or damaging the part.
Plain English
A way of looking inside an aircraft part using X-rays, similar to a medical X-ray, so hidden cracks or flaws can be found without taking the part apart or cutting it open.
Context Anchor
Seen in aircraft maintenance, especially when checking welds, castings, composite parts, or areas where damage may be hidden inside the structure.
Derivation
X-rays were named by physicist Wilhelm Röntgen in 1895, who used 'X' to mean 'unknown' because he didn't yet understand the radiation he had discovered. The name stuck even after the physics was worked out.
Why Pilots Care
Detects internal structural problems before they cause in-flight failure, directly supporting airworthiness and safety.
Analogy
It is similar to an airport baggage scanner: the outside of the bag may look normal, but the X-ray image can show what is hidden inside.
Intuition Check
X-Ray Inspection does not mean the part becomes radioactive. It means X-rays are used briefly to create an image of the inside of the part.
Example Sentence 1
After the hard landing, the engine mount was sent out for X-ray inspection to check for cracks in the welds.
Example Sentence 2
Following the gear-up landing, maintenance performed an X-ray inspection on the fuselage longerons.