Where can you find information about the location of the doubler in the fuselage skin assembly?

The information about the location of the doubler in the fuselage skin assembly can be found on the engineering drawing. Engineering drawings are detailed technical documents that provide specifications, layouts, and assembly instructions, including the placement of components like doublers. These drawings often include dimensions, tolerances, material specifications, and orientation details critical for accurate assembly and structural integrity.

The engineering drawing serves as the definitive source of information to ensure that components are installed correctly and safely, following the manufacturer’s design intent. This level of detail is essential in aerospace manufacturing, where precision is paramount to performance and safety.