# Proposed AD FAA-2025-2559: 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 2026-06-06
- Products: Airbus Canada Limited Partnership
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 29, 2025, 90 FR 46533
- Comments due: November 13, 2025
- Became: [AD 2026-06-06](https://openairdocs.org/ad/2026-06-06)
- Docket: FAA-2025-2559 (https://www.regulations.gov/docket/FAA-2025-2559, where comments are filed)
- Project: MCAI-2025-00053-T
- FR document: 2025-18808
- Official PDF: https://openairdocs.org/files/sha256/e5/f0/e5f08768bd110e4d9a8473dbb8f4a1c31566ea30d72f00c49a57a30a26a35d55 (from https://www.govinfo.gov/content/pkg/FR-2025-09-29/pdf/2025-18808.pdf)
- Federal Register: https://www.federalregister.gov/documents/2025/09/29/2025-18808/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2025-18808-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2025-2559

## Summary

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 the discovery on the production line that the electrical system harnesses in lavatory A had reduced bend radii, were not properly secured, and did not meet the requirement for clearance from an oxygen supply line. This proposed AD would require an inspection of the sleeve and electrical harness for chafing damage and incorrect installation, and applicable on-condition actions. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Sep 29, 2025: Notice of proposed rulemaking (NPRM). (first notice), FR document 2025-18808, comments due Nov 13, 2025 (https://www.federalregister.gov/documents/2025/09/29/2025-18808/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c)

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