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 Sept. 2, 2026. Document 2026-17967. Updated Nov. 6, 2026.

What it does

The FAA proposes to supersede Airworthiness Directive (AD) 2021-17-07, which applies to certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. AD 2021-17-07 requires inspecting for damage of the left and right motive flow (MF) flexible fuel line assemblies (including the flexible hose and shroud assemblies), and replacing damaged parts. Since the FAA issued AD 2021- 17-07, the FAA has determined that four additional airplanes may be subject to the unsafe condition. This proposed AD would continue to require the actions in AD 2021-17-07 and expand the applicability. The FAA is proposing this AD to address the unsafe condition on these products.

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

What it would change

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

14 CFR 39

Before this

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

Sept. 1, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Helicopters
Aug. 28, 2026 Final rule. Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes
Aug. 28, 2026 Final rule; request for comments. Airworthiness Directives; Bell Textron Canada Limited Helicopters
Aug. 28, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Embraer S.A. Airplanes
Aug. 28, 2026 Final rule; request for comments. Airworthiness Directives; Lycoming Engines
Aug. 28, 2026 Final rule. Airworthiness Directives; Various Helicopters
Aug. 28, 2026 Final rule. Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Engines
Aug. 28, 2026 Final rule. Airworthiness Directives; Leonardo S.p.A. Helicopters

Since then:

What happens next and when

The FAA must receive comments on this proposed AD by October 19, 2026.

The agency's dates, word for word.

Check it yourself

The record as published

Document number	2026-17967
Action	Notice of proposed rulemaking (NPRM).
Agencies	Transportation Department; Federal Aviation Administration
Published	Sept. 2, 2026
Comments close	Oct. 19, 2026
Regulation identifier (RIN)	2120-AA64
Docket	FAA-2026-8794

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