Definition
A nondestructive inspection method that uses penetrating radiation, typically X-rays or gamma rays, to produce an image of the internal structure of a part on film or a digital detector. Variations in material thickness, density, or the presence of cracks, voids, and inclusions show up as differences in image darkness, allowing inspectors to find hidden defects without cutting the part open.
Plain English
Taking an X-ray of an aircraft part to see what's going on inside it without taking it apart or damaging it.
Context Anchor
Seen in aircraft maintenance inspections, especially when checking welds, castings, composite parts, or other parts where damage may be hidden inside.
Derivation
From Latin radius (ray) and Greek graphia (writing or recording). Literally 'recording with rays' — the radiation passes through the part and writes an image of what's inside.
Why Pilots Care
Hidden cracks or voids in critical structures can cause failures that no visual inspection would catch. Radiography is one of the standard ways maintenance confirms a part is internally sound before it returns to service.
Analogy
Radiography is like a doctor using an X-ray to see a broken bone without opening the body. In aircraft maintenance, the part is the patient, and the image helps reveal what cannot be seen from the outside.
Intuition Check
Radiography does not mean radio communication. Here, “radio-” refers to radiation rays used to make an inspection image.
Example Sentence 1
The technician used radiography to inspect the engine mount weld for internal cracks before signing off the repair.
Example Sentence 2
Radiography of the engine mount revealed a void in the weld that required repair before flight.