# Proposed AD FAA-2024-2023: Bombardier, Inc., Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2025-02-01
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 21, 2024, 89 FR 67577
- Comments due: October 7, 2024
- Became: [AD 2025-02-01](https://openairdocs.org/ad/2025-02-01)
- Docket: FAA-2024-2023 (https://www.regulations.gov/docket/FAA-2024-2023, where comments are filed)
- Project: MCAI-2023-01246-T
- FR document: 2024-18478
- Official PDF: https://openairdocs.org/files/sha256/a0/39/a039615b1b04f1669ac291757c3280f73a1aecc7aea40d352a8a1008ebc35945 (from https://www.govinfo.gov/content/pkg/FR-2024-08-21/pdf/2024-18478.pdf)
- Federal Register: https://www.federalregister.gov/documents/2024/08/21/2024-18478/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2024-18478-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2024-2023

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes. This proposed AD was prompted by uncommanded horizontal stabilizer motion during several in-service events caused by a problem with the trim switch wiring. This proposed AD would require installing the pitch/roll trim switch relays. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 21, 2024: Notice of proposed rulemaking (NPRM). (first notice), FR document 2024-18478, comments due Oct 7, 2024 (https://www.federalregister.gov/documents/2024/08/21/2024-18478/airworthiness-directives-bombardier-inc-airplanes)

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