Airworthiness Directives; Bell Textron Canada Limited Helicopters

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register March 20, 2026. Document 2026-05549. Updated Nov. 13, 2026.

What it does

The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 429 helicopters. This AD was prompted by reports of incorrectly installed lockwire on the stability and control augmentation system (SCAS) actuator jam nut. This AD requires inspecting the installation of the lockwire on the SCAS actuator jam nut and, if the lockwire is incorrectly installed, removing the lockwire and installing a new lockwire correctly. This AD also prohibits the installation of an affected SCAS actuator assembly unless certain requirements are met. 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

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

March 19, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; General Electric Company Engines
March 19, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes
March 18, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; The Boeing Company Airplanes
March 17, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
March 17, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus SAS Airplanes
March 17, 2026 Final rule. Airworthiness Directives; Extra Aerobatic Aircraft GmbH Airplanes
March 16, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
March 16, 2026 Final rule. Airworthiness Directives; Airbus Helicopters

Since then:

What happens next and when

This AD is effective April 24, 2026.

The agency's dates, word for word.

Check it yourself

The record as published

Document number	2026-05549
Action	Final rule.
Agencies	Transportation Department; Federal Aviation Administration
Published	March 20, 2026
Effective date	April 24, 2026
Regulation identifier (RIN)	2120-AA64
Docket	FAA-2025-5030

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