(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; or
(2) Any aircraft for which the FAA has issued an experimental certificate under the provisions of Sec. 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 Sec. 21.190 of this chapter.
(c) This part applies to all life-limited parts that are removed from a type certificated product, segregated, or controlled as provided in Sec. 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 Sec. Sec. 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. [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]