Which document would you use to verify the official part numbers and the exact replacement assemblies for components?

• A. Weight and Balance Manual
• B. Aircraft Maintenance Manual
• C. Wiring Diagram Manual
• D. Illustrated Parts Catalog

Answer: (D)

When you’re replacing a component, you must know the exact part number and how the part fits into the overall assembly. The Illustrated Parts Catalog provides the official manufacturer part numbers and shows exploded views that reveal which parts are included in each assembly and how they relate to one another. Using it, you can look up a component, find its exact part number, and see all subassemblies and fittings that come with it, ensuring you order the correct item and understand what needs replacement. The other manuals focus on different needs: weight and balance data, maintenance procedures and limits, or electrical wiring diagrams. They don’t list official part numbers or the precise assembly breakdown, which is why the Illustrated Parts Catalog is the go-to resource for verifying parts and replacements.