# Proposed AD FAA-2023-1818: 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 2024-05-08
- Products: Airbus Canada Limited Partnership
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 6, 2023, 88 FR 60901
- Comments due: October 23, 2023
- Became: [AD 2024-05-08](https://openairdocs.org/ad/2024-05-08)
- Docket: FAA-2023-1818 (https://www.regulations.gov/docket/FAA-2023-1818, where comments are filed)
- Project: MCAI-2023-00582-T
- FR document: 2023-19076
- Official PDF: https://openairdocs.org/files/sha256/a7/4c/a74cea87fe0f34dea85b51709c1662fd66b5f7bc3b46f0ff9efef474089dfe70 (from https://www.govinfo.gov/content/pkg/FR-2023-09-06/pdf/2023-19076.pdf)
- Federal Register: https://www.federalregister.gov/documents/2023/09/06/2023-19076/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2023-19076-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2023-1818

## 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 a report of a fouling condition (interference) between the gimbal bushing and the airplane horizontal stabilizer trim actuator (HSTA) structural fitting, which prevented engagement of the secondary load path. This proposed AD would require replacing the upper gimbal bushing flanges, 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

- Sep 6, 2023: Notice of proposed rulemaking (NPRM). (first notice), FR document 2023-19076, comments due Oct 23, 2023 (https://www.federalregister.gov/documents/2023/09/06/2023-19076/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c)

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