1. 8118. (1) According to 14 CFR Part 91, repairs to an aircraft skin should have a detailed dimensional sketch included in the permanent records. (2) On occasion, a mechanic may need to make a simple sketch of a proposed repair to an aircraft, a new design, or a modification. Regarding the above statements, A. only No. 1 is true. B. only No. 2 is true. C. both No. 1 and No. 2 are true.