Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register May 27, 2026. Document 2026-10489. Updated Nov. 10, 2026.

What it does

The FAA is adopting a new airworthiness directive (AD) for all Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. This AD was prompted by certification testing that found that environmental control system (ECS) ducts manufactured using a certain material failed the flammability test requirements established for compliance. This AD requires inspecting the affected ECS ducts, installing a fire-resistant sleeve assembly over any non-compliant ECS duct as applicable, and re-identifying the ceiling panel liners. This AD also prohibits the installation of ECS ducts as replacement parts under certain conditions. 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 482 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

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

Since then:

What happens next and when

This AD is effective July 1, 2026.

The agency's dates, word for word.

Check it yourself

The record as published

Document number	2026-10489
Action	Final rule.
Agencies	Transportation Department; Federal Aviation Administration
Published	May 27, 2026
Effective date	July 1, 2026
Regulation identifier (RIN)	2120-AA64
Docket	FAA-2025-0199

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