# Proposed AD FAA-2024-1893: 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 2025-03-05
- Products: Airbus Canada Limited Partnership
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 24, 2024, 89 FR 59851
- Comments due: September 9, 2024
- Became: [AD 2025-03-05](https://openairdocs.org/ad/2025-03-05)
- Docket: FAA-2024-1893 (https://www.regulations.gov/docket/FAA-2024-1893, where comments are filed)
- Project: MCAI-2023-01050-T
- FR document: 2024-16041
- Official PDF: https://openairdocs.org/files/sha256/44/e0/44e0c608a2def38d92a0cf0e3c7ccd909b7df36d13df89afb5a3ddd0b5d093f2 (from https://www.govinfo.gov/content/pkg/FR-2024-07-24/pdf/2024-16041.pdf)
- Federal Register: https://www.federalregister.gov/documents/2024/07/24/2024-16041/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2024-16041-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2024-1893

## 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 reported events of annunciated horizontal stabilizer trim actuator (HSTA) jams occurring at the end of the cruise phase of flight. This proposed AD would require lubricating the HSTA using an improved method, at a reduced interval, 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

- Jul 24, 2024: Notice of proposed rulemaking (NPRM). (first notice), FR document 2024-16041, comments due Sep 9, 2024 (https://www.federalregister.gov/documents/2024/07/24/2024-16041/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c)

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