# Proposed AD FAA-2022-0672: De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-23-01
- Products: De Havilland Aircraft of Canada
- Product type: Aircraft
- Action: Supplemental notice of proposed rulemaking (SNPRM).
- Published: August 31, 2022, 87 FR 53424
- Comments due: October 17, 2022
- Became: [AD 2022-23-01](https://openairdocs.org/ad/2022-23-01)
- Docket: FAA-2022-0672 (https://www.regulations.gov/docket/FAA-2022-0672, where comments are filed)
- Project: MCAI-2020-01606-T
- FR document: 2022-18749
- Official PDF: https://openairdocs.org/files/sha256/1e/36/1e3687a0464bf88c88be9d2a24dcb12f32301f715af7d9561e3afe3fccd25417 (from https://www.govinfo.gov/content/pkg/FR-2022-08-31/pdf/2022-18749.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/08/31/2022-18749/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-18749-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-0672

## Summary

The FAA is revising a notice of proposed rulemaking (NPRM) to supersede Airworthiness Directive (AD) 2020-04-20, which applies to certain De Havilland Aircraft of Canada Limited Model DHC-8-400 series airplanes. This action revises the NPRM by including an additional retained requirement and revising the terminating action to apply to additional airplanes. The FAA is proposing this AD to address the unsafe condition on these products. Since these actions would impose an additional burden over those in the NPRM, the FAA is reopening the comment period to allow the public the chance to comment on these changes.

## Notices in this docket

- Jun 9, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-12265, comments due Jul 25, 2022 (https://www.federalregister.gov/documents/2022/06/09/2022-12265/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by)
- Aug 31, 2022: Supplemental notice of proposed rulemaking (SNPRM)., FR document 2022-18749, comments due Oct 17, 2022 (https://www.federalregister.gov/documents/2022/08/31/2022-18749/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by)

---
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.