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 Feb. 23, 2026. Document 2026-03549. Updated Nov. 14, 2026.

What it does

The FAA proposes to supersede Airworthiness Directive (AD) 2025-06-01, which applies to all Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. AD 2025-06-01 requires revising the existing airplane flight manual (AFM) to incorporate the procedures for the flightcrew to manually isolate the opposite functional engine in the event of an engine bleed duct large leak condition. Since the FAA issued AD 2025-06-01, an electronic engine control (EEC) software update has been developed to address the unsafe condition. This proposed AD would continue to require the actions in AD 2025-06-01 and would require installing a certain EEC software update on both engines. This proposed AD would also remove airplanes from 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

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

Feb. 23, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus Helicopters
Feb. 23, 2026 Final rule; request for comments. Airworthiness Directives; Airbus Helicopters
Feb. 23, 2026 Final rule; request for comments. Airworthiness Directives; Airbus Helicopters
Feb. 23, 2026 Final rule. Airworthiness Directives; Airbus SAS Airplanes
Feb. 20, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; The Boeing Company Airplanes
Feb. 20, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus SAS Airplanes
Feb. 17, 2026 Final rule; request for comments. Airworthiness Directives; Bombardier Inc. Airplanes
Feb. 17, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus SAS Airplanes

Since then:

What happens next and when

The FAA must receive comments on this proposed AD by April 9, 2026.

The agency's dates, word for word.

Check it yourself

The record as published

Document number	2026-03549
Action	Notice of proposed rulemaking (NPRM).
Agencies	Transportation Department; Federal Aviation Administration
Published	Feb. 23, 2026
Comments close	April 9, 2026
Regulation identifier (RIN)	2120-AA64
Docket	FAA-2026-1336

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