14 CFR · Part 21
14 CFR § 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.
Reflects the eCFR edition current as of September 29, 2026. Retrieved from ecfr.gov on October 16, 2026.
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