---
kind: "section"
citation: "14 C.F.R. § 21.319"
title: "14"
number: "21.319"
heading: "Design changes."
url: "https://uscodex.org/cfr/14/21.319"
---

# §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.

## Notes

### Source

Source: Docket No. FAA-2006-25877, Amdt. 21-92, 74 FR 53390, Oct. 16, 2009, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7572; 49 U.S.C. 106(f), 40105, 40113, 44701-44702, 44704, 44707, 44709, 44711, 44713, 44715, 45303.