***Link*** :: [§ 43.3 Persons authorized to perform maintenance, preventive maintenance, rebuilding, and alterations.](https://www.ecfr.gov/current/title-14/section-43.3) ***Description*** :: `= this.link` ***Author*** :: [[FAA]] #### Key Quotes * A person working under the supervision... may perform the maintenance, preventive maintenance, and alterations that his supervisor is authorized to perform, if the supervisor personally observes the work.... However, this paragraph does not authorize.... * ...holder of a pilot certificate issued under [[Part 61]] may perform [[preventive maintenance]] on any aircraft owned or operated by that pilot which is not used under [[Part 121]], [[part 129|129]], or [[Part 135|135]] of this chapter. * The holder of a sport pilot certificate may perform preventive maintenance on an aircraft owned or operated by that pilot and issued a special airworthiness certificate in the [[LSA|light-sport category]]. * Updates of databases in installed avionics meeting the conditions of this paragraph are not considered maintenance... provided.... #source #far