# Proposed AD FAA-2025-0344: Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2025-19-01
- Products: Airbus Canada Limited Partnership
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 18, 2025, 90 FR 12498
- Comments due: May 2, 2025
- Became: [AD 2025-19-01](https://openairdocs.org/ad/2025-19-01)
- Docket: FAA-2025-0344 (https://www.regulations.gov/docket/FAA-2025-0344, where comments are filed)
- Project: MCAI-2024-00638-T
- FR document: 2025-03941
- Official PDF: https://openairdocs.org/files/sha256/b9/6c/b96c037cb85ae37b018c8850af86c37fc63e6b665e43df0003d791ba9d4f5293 (from https://www.govinfo.gov/content/pkg/FR-2025-03-18/pdf/2025-03941.pdf)
- Federal Register: https://www.federalregister.gov/documents/2025/03/18/2025-03941/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2025-03941-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2025-0344

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2022-25-51, which applies to all Airbus Canada Limited Partnership Model BD-500-1A10 and Model BD-500-1A11 airplanes. AD 2022-25-51 requires 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 proposed AD would continue to require the actions in AD 2022-25-51, require installing the updated PFCC software, which terminates the AFM revision, and remove airplanes from the applicability, as specified in a Transport Canada AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Mar 18, 2025: Notice of proposed rulemaking (NPRM). (first notice), FR document 2025-03941, comments due May 2, 2025 (https://www.federalregister.gov/documents/2025/03/18/2025-03941/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c)

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