According to 14 CFR Part 91, repairs to an aircraft skin should have a detailed dimensional sketch included in the permanent records.

According to 14 CFR Part 91, repairs to an aircraft skin should have a detailed dimensional sketch included in the permanent records.

• A. True
• B. False
• C. Not specified
• D. Not applicable

Answer: (A)

Understanding how repairs are documented is key to ensuring ongoing airworthiness. When a repair to the aircraft skin is done, the maintenance records must capture not just that a repair occurred, but exactly what was done and how it relates to the aircraft’s structure. For repairs that use FAA-approved repair data or involve major repairs/alterations, the data used to perform the repair—and the exact geometry of the repair area—need to be preserved in the permanent records. A detailed dimensional sketch provides a precise, permanent reference for the size, shape, and location of the repaired skin, so future inspectors and maintainers can verify the repair, assess its impact on structural integrity, and confirm it aligns with approved data. Because of this requirement to document the precise dimensions and geometry in permanent records, the statement is true.

Understanding how repairs are documented is key to ensuring ongoing airworthiness. When a repair to the aircraft skin is done, the maintenance records must capture not just that a repair occurred, but exactly what was done and how it relates to the aircraft’s structure. For repairs that use FAA-approved repair data or involve major repairs/alterations, the data used to perform the repair—and the exact geometry of the repair area—need to be preserved in the permanent records. A detailed dimensional sketch provides a precise, permanent reference for the size, shape, and location of the repaired skin, so future inspectors and maintainers can verify the repair, assess its impact on structural integrity, and confirm it aligns with approved data. Because of this requirement to document the precise dimensions and geometry in permanent records, the statement is true.