# Proposed AD FAA-2026-13807: 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: Comments due Dec 28
- Products: Airbus Canada Limited Partnership BD-500-1A10 and BD-500-1A11
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 10, 2026, 91 FR 72465
- Comments due: December 28, 2026
- Docket: FAA-2026-13807 (https://www.regulations.gov/docket/FAA-2026-13807, where comments are filed)
- Project: MCAI-2026-00620-T
- FR document: 2026-22919
- Official PDF: https://openairdocs.org/files/sha256/a7/4f/a74f417fd1cd7e9f32b383a5d23306ec31c0957ee88769ba0d4806a37db37dd6 (from https://www.govinfo.gov/content/pkg/FR-2026-11-10/pdf/2026-22919.pdf)
- Federal Register: https://www.federalregister.gov/documents/2026/11/10/2026-22919/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2026-22919-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2026-13807

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2021-13-20, which applies to certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. AD 2021-13-20 requires inspecting the waste box, waste access doubler, and waste service door for corrosion, and doing applicable on-condition actions. Since the FAA issued AD 2021-13-20, the FAA has determined that a full secondary fuel vapor barrier must be applied. This proposed AD would retain all requirements of AD 2021-13-20 and would also require, for certain airplanes, an additional inspection of the waste box, waste access doubler, and waste service door for corrosion, and applicable on- condition actions. The FAA is proposing this AD to address the unsafe condition on these products.

## Docket FAA-2026-13807 (1)

The documents in the docket on regulations.gov (https://www.regulations.gov/docket/FAA-2026-13807), oldest first. Comments are on regulations.gov.

- [Airworthiness Directives: Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes](https://www.regulations.gov/document/FAA-2026-13807-0001) (Proposed rule, posted Nov 10, 2026)

## Notices in this docket

- Nov 10, 2026: Notice of proposed rulemaking (NPRM). (first notice), FR document 2026-22919, comments due Dec 28, 2026 (https://www.federalregister.gov/documents/2026/11/10/2026-22919/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c)

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