Definition
A drawing that shows the information needed to properly install a part, component, or assembly in its intended location, including dimensions, mounting points, clearances, attaching hardware, and the relationship of the item to surrounding structure or equipment.
Plain English
A drawing that shows exactly how and where something gets fitted into the aircraft, with all the measurements and connection details needed to put it in correctly.
Context Anchor
Seen in aircraft maintenance, repair, avionics work, equipment changes, and records for installed parts.
Derivation
“Installation” comes from older words meaning to place something in position for use. “Drawing” refers to information shown with lines and labels. Together, the term points to a drawing used not just to show what something looks like, but to show how to put it in the aircraft correctly.
Why Pilots Care
Ensures components are fitted correctly, maintaining structural integrity, system function, and regulatory compliance.
Intuition Check
Do not think of an installation drawing as a rough sketch or simple picture. In maintenance, it is a controlled technical guide for placing, fastening, and connecting something correctly.
Example Sentence 1
The mechanic followed the installation drawing to mount the new avionics tray in the panel.
Example Sentence 2
Always check the installation drawing before connecting hydraulic lines to avoid leaks.