14 CFR § 39.15 - Does an airworthiness directive apply if the product has been changed?

---
identifier: "/us/cfr/t14/s39.15"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 39.15 - Does an airworthiness directive apply if the product has been changed?"
title_number: 14
title_name: "Aeronautics and Space"
section_number: "39.15"
section_name: "Does an airworthiness directive apply if the product has been changed?"
chapter_name: "FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "C"
subchapter_name: "AIRCRAFT"
part_number: "39"
part_name: "AIRWORTHINESS DIRECTIVES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 106(g), 40113, 44701."
regulatory_source: "Docket No. FAA-2000-8460, 67 FR 48003, July 22, 2002, unless otherwise noted."
cfr_part: "39"
---


# 39.15 Does an airworthiness directive apply if the product has been changed?

Yes, an airworthiness directive applies to each product identified in the airworthiness directive, even if an individual product has been changed by modifying, altering, or repairing it in the area addressed by the airworthiness directive.