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AD 2025-18088

Published 2025-09-18 · 1 model · 14 US-registered tails affected · Federal Register

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

Abstract

The FAA is superseding Airworthiness Directive (AD) 2022-25- 51, which applied to all Airbus Canada Limited Partnership Model BD- 500-1A10 and Model BD-500-1A11 airplanes. AD 2022-25-51 required revising the Limitations section of the existing airplane flight manual (AFM) to include a new warning and a new limitation. Since the FAA issued AD 2022-25-51, updated primary flight control computer (PFCC) software has been developed to address the unsafe condition. This AD continues to require the actions in AD 2022-25-51, requires installing the updated PFCC software, which terminates the AFM revision, and removes airplanes from the applicability. The FAA is issuing this AD to address the unsafe condition on these products.

Applicability · by US fleet size

Federal Register text

Verbatim; the Federal Register publication is the legally binding document. Cite: 90 FR 44959. View on Federal Register ↗

[Federal Register Volume 90, Number 179 (Thursday, September 18, 2025)] [Rules and Regulations] [Pages 44959-44961] From the Federal Register Online via the Government Publishing Office [www.gpo.gov] [FR Doc No: 2025-18088]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2025-0344; Project Identifier MCAI-2024-00638-T; Amendment 39-23141; AD 2025-19-01] RIN 2120-AA64

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

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2022-25- 51, which applied to all Airbus Canada Limited Partnership Model BD- 500-1A10 and Model BD-500-1A11 airplanes. AD 2022-25-51 required revising the Limitations section of the existing airplane flight manual (AFM) to include a new warning and a new limitation. Since the FAA issued AD 2022-25-51, updated primary flight control computer (PFCC) software has been developed to address the unsafe condition. This AD continues to require the actions in AD 2022-25-51, requires installing the updated PFCC software, which terminates the AFM revision, and removes airplanes from the applicability. The FAA is issuing this AD to address the unsafe condition on these products.

DATES: This AD is effective October 23, 2025. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of October 23, 2025.