# Federal Register 2026-17581 — effective 2026-10-02 — Airworthiness Directives; Leonardo S.p.A. Helicopters — Federal Aviation Administration

For Federal Register 2026-17581, effective date is 2026-10-02; agency is Federal Aviation Administration; published is 2026-08-28; cfr parts amended is 14 CFR 39; dates, as printed is This AD is effective October 2, 2026, recorded from its source on 2026-08-31; source re-checked 2026-09-16.

- **FR document number:** 2026-17581 _(verified: appears in the quote below)_
- **Rule:** Airworthiness Directives; Leonardo S.p.A. Helicopters _(verified: appears in the quote below)_
- **Agency:** Federal Aviation Administration _(verified: appears in the quote below)_
- **Effective date:** 2026-10-02 _(verified: appears in the quote below)_
- **DATES, as printed:** This AD is effective October 2, 2026. _(verified: appears in the quote below)_
- **CFR parts amended:** 14 CFR 39 _(our reading, not quoted from the source)_
- **Published:** 2026-08-28 _(verified: appears in the quote below)_

## What the source says

> {"document_number":"2026-17581","title":"Airworthiness Directives; Leonardo S.p.A. Helicopters","agency_names":["Transportation Department","Federal Aviation Administration"],"effective_on":"2026-10-02","dates":"This AD is effective October 2, 2026.","cfr_references":[{"chapter":null,"citation_url":null,"part":"39","title":14}],"publication_date":"2026-08-28","html_url":"https://www.federalregister.gov/documents/2026/08/28/2026-17581/airworthiness-directives-leonardo-spa-helicopters"}

## Source

- https://www.federalregister.gov/api/v1/documents.json?per_page=1000&order=oldest&conditions%5Btype%5D%5B%5D=RULE&conditions%5Beffective_date%5D%5Bgte%5D=2026-08-31&conditions%5Beffective_date%5D%5Blte%5D=2026-12-31&fields%5B%5D=document_number&fields%5B%5D=title&fields%5B%5D=agency_names&fields%5B%5D=effective_on&fields%5B%5D=dates&fields%5B%5D=cfr_references&fields%5B%5D=publication_date&fields%5B%5D=html_url

Last verified: 2026-09-16. Review by: 2026-09-29.
Part of [Federal rules taking effect: every US final rule in the Federal Register, by effective date](https://referencesource.org/federal-rules-taking-effect/).