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 K—Approval of Materials, Parts, Processes, and Appliances (§21.301 to §21.320) > 21.319—Design changes.

21.319—Design changes.

Code of Federal Regulations

Effective Date Note: By Docket No. FAA-2006-25877, 74 FR 53390, Oct. 16, 2009, subpart K of part 21 was revised, effective Apr. 14, 2010. The effective date of this revision was subsequently postponed to Apr. 16, 2011 at 75 FR 9095, Mar. 1, 2010. For the convenience of the user, the revised text is set forth as follows: Subpart K—Parts Manufacturer Approvals § 21.319 Design changes. (a) Classification of design changes. (1) A “minor change” to the design of an article produced under a PMA is one that has no appreciable effect on the approval basis. (2) A “major change” to the design of an article produced under a PMA is any change that is not minor. (b) Approval of design changes. (1) Minor changes to the basic design of a PMA may be approved using a method acceptable to the FAA. (2) The PMA holder must obtain FAA approval of any major change before including it in the design of an article produced under a PMA.