FAA Aviation Mechanic General (AMG)Aircraft Drawings, Weight and BalanceMedium
A technician needs to know exactly how many rivets of a specific part number are required to complete a wing skin assembly shown on an engineering drawing. Which part of the drawing provides this information?
- ARevision block
- BZone chart
- CBill of Materials
- DTitle block
Show answer & explanationAnswer & explanation
Correct answer: C. Bill of Materials
The Bill of Materials (also called a parts list) lists every part used in the drawing along with its part number, description, and quantity required. The title block instead identifies the drawing number, scale, and drafter, not quantities of individual parts.
Why the other options are wrong
- A. The revision block records changes made to the drawing over time, not part quantities.
- B. A zone chart divides the aircraft into location zones for reference, unrelated to parts quantities.
- D. The title block contains drawing number, scale, and revision level, not part quantities.
Bill of Materials (Parts List)
A table on an engineering drawing listing every part number, description, material, and quantity required for the assembly.
- Lists part number and description
- Shows quantity required per assembly
- Usually placed above the title block or on a separate sheet
Memory trick: Bill of Materials = grocery list for the assembly.