Section 43.1 - [Effective 1/21/2025] Applicability(a) Except as provided in paragraphs (b) and (d) of this section, this part prescribes rules governing the maintenance, preventive maintenance, rebuilding, and alteration of any- (1) Aircraft having a U.S. airworthiness certificate;(2) Foreign-registered civil aircraft used in common carriage or carriage of mail under the provisions of Part 121 or 135 of this chapter; and(3) Airframe, aircraft engines, propellers, appliances, and component parts of such aircraft.(b) This part does not apply to- (1) Any aircraft for which the FAA has issued an experimental certificate, unless the FAA has previously issued a different kind of airworthiness certificate for that aircraft;(2) Any aircraft for which the FAA has issued an experimental certificate under the provisions of § 21.191(i)(3) of this chapter, and the aircraft was previously issued a special airworthiness certificate in the light-sport category under the provisions of § 21.190 of this chapter; or(3) Any aircraft that is operated under part 107 of this chapter, except as described in § 107.140(d) .(c) This part applies to all life-limited parts that are removed from a type certificated product, segregated, or controlled as provided in § 43.10 .(d) This part applies to any aircraft issued a special airworthiness certificate in the light-sport category except: (1) The repair or alteration form specified in §§ 43.5(b) and 43.9(d) is not required to be completed for products not produced under an FAA approval;(2) Major repairs and major alterations for products not produced under an FAA approval are not required to be recorded in accordance with appendix B of this part; and(3) The listing of major alterations and major repairs specified in paragraphs (a) and (b) of appendix A of this part is not applicable to products not produced under an FAA approval.(e) Additional applicability of maintenance provisions for powered-lift is set forth in part 194 of this chapter.Doc. No. 1993, 29 FR 5451, Apr. 23, 1964, as amended by Amdt. 43-23, 47 FR 41084, Sept. 16, 1982; Amdt. 43-37, 66 FR 21066 , Apr. 27, 2001; Amdt. 43-38, 67 FR 2109 , Jan. 15, 2002; Amdt. 43-39, 69 FR 44863 , July 27, 2004; Amdt. 43-44, 75 FR 5219 , Feb. 1, 2010; Docket FAA-2015-0150, Amdt. 43-48, 81 FR 42208 , June 28, 2016; Docket FAA-2018-1087, Amdt. 43-51, 86 FR 4381 , Jan. 15, 2021 86 FR 4381 , 3/16/2021; 89 FR 92483 , 1/21/2025