Airworthiness Directives; Airbus Helicopters

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register April 6, 2026. Document 2026-06621. Updated Nov. 13, 2026.

What it does

The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355NP helicopters. This AD was prompted by a report of a structural crack in the vertical attachment spar of the tail fin. This AD requires repetitive inspections of certain vertical upper fin spars and, depending on the results, corrective action. This AD also prohibits installing certain upper fin assemblies. The FAA is issuing this AD to address the unsafe condition on these products.

The Federal Aviation Administration's summary, as published in the Federal Register.

What changed in the regulation

1 part of Title 14 of the Code of Federal Regulations:

14 CFR 39

Wording on eCFR: the day before it took effect and from the day it took effect (first part listed).

Compared with

The Federal Aviation Administration has published 488 final rules in 2026 so far, compared with 518 in all of 2025.

Counted by the Tribune from Federal Register records since Jan. 1, 2025.

Before this

731 earlier Federal Register documents under regulation identifier 2120-AA64 since Jan. 1, 2025.

Since then:

What happens next and when

This AD is effective May 11, 2026.

The agency's dates, word for word.

Check it yourself

The record as published

Document number	2026-06621
Action	Final rule.
Agencies	Transportation Department; Federal Aviation Administration
Published	April 6, 2026
Effective date	May 11, 2026
Regulation identifier (RIN)	2120-AA64
Docket	FAA-2025-5039

Source: the Federal Register (public domain). The document in the Federal Register