14 C.F.R. § 65.79 Skill requirements.
Title 14 - Aeronautics and Space
Each applicant for a mechanic certificate or rating must pass an oral and a practical test on the rating he seeks. The tests cover the applicant's basic skill in performing practical projects on the subjects covered by the written test for that rating. An applicant for a powerplant rating must show his ability to make satisfactory minor repairs to, and minor alterations of, propellers.
Title 14: Aeronautics and Space
PART 65—CERTIFICATION: AIRMEN OTHER THAN FLIGHT CREWMEMBERS
Subpart D—Mechanics
§ 65.79 Skill requirements.