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 March 24, 2026. Document 2026-05699. Updated Nov. 13, 2026.

What it does

The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD- 500-1A11 airplanes. This proposed AD was prompted by a report of multiple in-service failures of pressure regulating shutoff valves (PRSOVs). This proposed AD would require revising the existing airplane flight manual (AFM) to incorporate procedures for reducing the thrust lever or shutting down the engine when the BLEED LEAK caution message is persistent, prohibit operation in known or forecasted icing conditions under certain minimum equipment list (MEL) provisions where the only operative PRSOV is an affected part, and require replacement of affected PRSOVs with improved PRSOVs. 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

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

Since then:

What happens next and when

The FAA must receive comments on this proposed AD by May 8, 2026.

The agency's dates, word for word.

Check it yourself

The record as published

Document number	2026-05699
Action	Notice of proposed rulemaking (NPRM).
Agencies	Transportation Department; Federal Aviation Administration
Published	March 24, 2026
Comments close	May 8, 2026
Regulation identifier (RIN)	2120-AA64
Docket	FAA-2026-2721

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