# Proposed AD FAA-2025-0911: 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 2025-17-01
- Products: Airbus Canada Limited Partnership
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 21, 2025, 90 FR 21700
- Comments due: July 7, 2025
- Became: [AD 2025-17-01](https://openairdocs.org/ad/2025-17-01)
- Docket: FAA-2025-0911 (https://www.regulations.gov/docket/FAA-2025-0911, where comments are filed)
- Project: MCAI-2025-00119-T
- FR document: 2025-09080
- Official PDF: https://openairdocs.org/files/sha256/17/71/17719eba2bd9bf28b921ee1c225af60540a17aa9fc12d4db343f7a24b67b07fc (from https://www.govinfo.gov/content/pkg/FR-2025-05-21/pdf/2025-09080.pdf)
- Federal Register: https://www.federalregister.gov/documents/2025/05/21/2025-09080/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2025-09080-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2025-0911

## 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 reports that the interface pin of the secondary load path in the upper gimbal of the horizontal stabilizer trim actuator (HSTA) was incorrectly installed. This proposed AD would require a detailed visual inspection of the interface pin of the HSTA to determine if the interface pin is incorrectly installed, and applicable on-condition actions 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

- May 21, 2025: Notice of proposed rulemaking (NPRM). (first notice), FR document 2025-09080, comments due Jul 7, 2025 (https://www.federalregister.gov/documents/2025/05/21/2025-09080/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.