Definition
A simple, freehand drawing used in aircraft maintenance to record damage, repairs, modifications, or fabrication details. A sketch is not drawn to scale, but it must be clear enough that another technician can understand the shape, dimensions, and location of what is shown, and reproduce or inspect the work from it.
Plain English
A quick hand-drawn picture that shows the size, shape, and location of a part, repair, or damaged area, with enough notes and measurements that someone else can understand exactly what was done or what needs to be done.
Context Anchor
Seen in aircraft maintenance when a technician records a repair, explains a damaged area, or shows how a part or fitting is arranged.
Derivation
From the Italian 'schizzo,' meaning a rough or impromptu drawing. The original idea was a quick drawing made on the spot, which fits how technicians use sketches to capture information at the worksite.
Why Pilots Care
A clear sketch can help maintenance personnel and pilots communicate about a defect or repair area, reducing the chance that something is misunderstood.
Intuition Check
A sketch is not automatically an approved drawing or exact blueprint. In maintenance, it is a quick visual aid unless the instructions specifically make it part of an approved procedure.
Example Sentence 1
The technician made a sketch of the dent on the leading edge, noting the length, depth, and distance from the wing root.
Example Sentence 2
Use the sketch in the manual to locate the correct bolt holes during reassembly.