What is an installation drawing?

• A. A drawing that shows the location of the parts and assemblies on the complete aircraft.
• B. A diagram that shows only electrical circuits.
• C. A plan view of seating arrangements.
• D. A simple sketch without dimensions.

Answer: (A)

An installation drawing shows how and where parts and assemblies are located on the finished aircraft. It provides the exact locations, mounting points, clearances, and how components interface with other systems and structures, along with the dimensions and notes needed to actually install or service them. This kind of drawing guides the technician to place parts correctly so they fit without interference and align with other components, routing wiring or tubing as required and showing how everything ties together in the whole airframe. It’s different from diagrams that focus only on electrical circuits, or from cabin seating plans, or from simple sketches that don’t include measurements. The installation drawing supplies the precise placement information needed to assemble and maintain the aircraft accurately.