# Proposed AD FAA-2025-5024: 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 2026-10-12
- Products: Airbus Canada Limited Partnership
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 19, 2025, 90 FR 52005
- Comments due: January 5, 2026
- Became: [AD 2026-10-12](https://openairdocs.org/ad/2026-10-12)
- Docket: FAA-2025-5024 (https://www.regulations.gov/docket/FAA-2025-5024, where comments are filed)
- Project: MCAI-2025-00797-T
- FR document: 2025-20323
- Official PDF: https://openairdocs.org/files/sha256/d0/79/d079484aa3455cdc3522be8a661c30498d0e76ad4688af836e24ba707853f21c (from https://www.govinfo.gov/content/pkg/FR-2025-11-19/pdf/2025-20323.pdf)
- Federal Register: https://www.federalregister.gov/documents/2025/11/19/2025-20323/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2025-20323-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2025-5024

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2024-04-06, which applies to certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. AD 2024-04-06 requires repetitive operational checks of the gravity cross flow shut-off valve and, for certain airplanes, a one-time inspection of the motive flow fuel-feed tubes at the clamp blocks location, and applicable corrective action. Since the FAA issued AD 2024-04-06, the manufacturer developed additional corrective actions. This proposed AD would continue to require the actions in AD 2024-04-06 and would require replacement of the saddle clamp, inspection of the motive flow fuel-feed tubes, and applicable corrective actions. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Nov 19, 2025: Notice of proposed rulemaking (NPRM). (first notice), FR document 2025-20323, comments due Jan 5, 2026 (https://www.federalregister.gov/documents/2025/11/19/2025-20323/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.