# Proposed AD FAA-2022-1251: Bombardier, Inc., Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2023-02-01
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 5, 2022, 87 FR 60352
- Comments due: November 21, 2022
- Became: [AD 2023-02-01](https://openairdocs.org/ad/2023-02-01)
- Docket: FAA-2022-1251 (https://www.regulations.gov/docket/FAA-2022-1251, where comments are filed)
- Project: MCAI-2022-00588-T
- FR document: 2022-21573
- Official PDF: https://openairdocs.org/files/sha256/a3/9f/a39f132a7ee1644841d61b6e8a998f97d4682f554f8c29b1c41e6b1879b8ee40 (from https://www.govinfo.gov/content/pkg/FR-2022-10-05/pdf/2022-21573.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/10/05/2022-21573/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-21573-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-1251

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Bombardier, Inc., Model BD-100-1A10 airplanes. This proposed AD was prompted by an investigation that indicated that one of the springs in the pitch trim switch of the horizontal stabilizer had failed. The failure of the spring could result in the airplane pitching nose down when actually commanded nose up. This proposed AD would require a verification of the serial numbers of certain pitch trim switches, and replacement of the affected pitch trim switches with new ones in the pilot and co-pilot control wheels. This proposed AD would also prohibit the installation of affected parts. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Oct 5, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-21573, comments due Nov 21, 2022 (https://www.federalregister.gov/documents/2022/10/05/2022-21573/airworthiness-directives-bombardier-inc-airplanes)

---
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.