Which document is used to document major repairs and alterations to an aircraft, such as structural repairs?

Which document is used to document major repairs and alterations to an aircraft, such as structural repairs?

• A. FAA Form 91
• B. Airworthiness Directives
• C. The manufacturer’s structural repair manual
• D. Advisory Circulars

Answer: (C)

The main idea is that repairs and alterations must be done using approved data from the aircraft’s designer. The document that provides the exact methods, limits, and steps for repairing structural components is the manufacturer’s structural repair manual. It is the authoritative source that tells you how to conduct the repair properly and what workmanship standards to meet. When you complete the repair, you reference this manual in the maintenance records to show the work was performed according to approved data, which helps ensure the aircraft remains airworthy. Other options don’t supply the official repair procedures: a general Form isn’t a repair data source, Airworthiness Directives specify mandatory actions for safety issues but not the repair instructions, and Advisory Circulars offer guidance rather than the specific repair data.

The main idea is that repairs and alterations must be done using approved data from the aircraft’s designer. The document that provides the exact methods, limits, and steps for repairing structural components is the manufacturer’s structural repair manual. It is the authoritative source that tells you how to conduct the repair properly and what workmanship standards to meet. When you complete the repair, you reference this manual in the maintenance records to show the work was performed according to approved data, which helps ensure the aircraft remains airworthy. Other options don’t supply the official repair procedures: a general Form isn’t a repair data source, Airworthiness Directives specify mandatory actions for safety issues but not the repair instructions, and Advisory Circulars offer guidance rather than the specific repair data.