When must FAA-approved data be used for an engine repair or modification?

When must FAA-approved data be used for an engine repair or modification?

• A. During a major repair or modification to an engine.
• B. Only for minor cosmetic repairs.
• C. Only when replacing parts with airworthy alternatives.
• D. Only during warranty claims.

Answer: (A)

Major repairs or modifications to an engine must be performed using FAA-approved data. This data from the engine manufacturer, with FAA approval, lays out the exact procedures, limits, tolerances, and inspection criteria needed to restore the engine to airworthiness. Because major work can affect weight and balance, structural strength, reliability, and performance, following approved data ensures the repair aligns with the original design and regulatory requirements and that the work is properly documented. Cosmetic repairs are minor and don’t require the same approval scope, and warranty claims aren’t the trigger for using approved data.

Major repairs or modifications to an engine must be performed using FAA-approved data. This data from the engine manufacturer, with FAA approval, lays out the exact procedures, limits, tolerances, and inspection criteria needed to restore the engine to airworthiness. Because major work can affect weight and balance, structural strength, reliability, and performance, following approved data ensures the repair aligns with the original design and regulatory requirements and that the work is properly documented. Cosmetic repairs are minor and don’t require the same approval scope, and warranty claims aren’t the trigger for using approved data.