CFR > Title 14 - Aeronautics and Space > CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION > SUBCHAPTER C—AIRCRAFT (parts 21 to 50) > PART 21—CERTIFICATION PROCEDURES FOR PRODUCTS AND PARTS > SUBPART A—General (§21.1 to §21.9) > 21.9—Replacement and modification articles.

21.9—Replacement and modification articles.

(a) If a person knows, or should know, that a replacement or modification article is reasonably likely to be installed on a type-certificated product, the person may not produce that article unless it is—
(1) Produced under a type certificate;
(2) Produced under an FAA production approval;
(3) A standard part (such as a nut or bolt) manufactured in compliance with a government or established industry specification;
(4) A commercial part as defined in § 21.1 of this part ;
(5) Produced by an owner or operator for maintaining or altering that owner or operator's product; or
(6) Fabricated by an appropriately rated certificate holder with a quality system, and consumed in the repair or alteration of a product or article in accordance with part 43 of this chapter.
(b) Except as provided in paragraphs (a)(1) through (a)(4) of this section, a person who produces a replacement or modification article for sale may not represent that part as suitable for installation on a type-certificated product.
(c) Except as provided in paragraphs (a)(1) through (a)(4) of this section, a person may not sell or represent an article as suitable for installation on an aircraft type-certificated under §§ 21.25(a)(2) or 21.27 unless that article—
(1) Was declared surplus by the U.S. Armed Forces, and
(2) Was intended for use on that aircraft model by the U.S. Armed Forces.

Code of Federal Regulations

[Doc. No. FAA-2006-25877, 74 FR 53385, Oct. 16, 2009; 75 FR 9095, Mar. 1, 2010]

Code of Federal Regulations

Effective Date Note: At 74 FR 53385, Oct. 16, 2009, § 21.9 was added, effective Apr. 14, 2010. This effective date was postponed to Apr. 16, 2011 at 75 FR 9095, Mar. 1, 2010.

Code of Federal Regulations

Effective Date Note: At 75 FR 9095, Mar. 1, 2010, § 21.9 was amended by removing the words “(a)(1) through (a)(4)” and adding in their place the words “(a)(1) and (a)(2)”; in paragraph (b) and by removing the words “(a)(1) through (a)(4)” and adding in their place the words “(a)(1) and (a)(2)” in paragraph (c) introductory text, effective Apr. 16, 2011.