# Proposed AD FAA-2021-0514: De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-01-02
- Products: De Havilland Aircraft of Canada
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 29, 2021, 86 FR 34163
- Comments due: August 13, 2021
- Became: [AD 2022-01-02](https://openairdocs.org/ad/2022-01-02)
- Docket: FAA-2021-0514 (https://www.regulations.gov/docket/FAA-2021-0514, where comments are filed)
- Project: MCAI-2020-01570-T
- FR document: 2021-13726
- Official PDF: https://openairdocs.org/files/sha256/e8/ac/e8acacb229fdc67276a11bcce8b96007f4e981795d9db118e961e3426afe34ca (from https://www.govinfo.gov/content/pkg/FR-2021-06-29/pdf/2021-13726.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/06/29/2021-13726/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/20EFB31914816D2C86258703004BF93E.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0514

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain De Havilland Aircraft of Canada Limited Model DHC-8-400, - 401, and -402 airplanes. This proposed AD was prompted by a report that the epoxy primer on the internal bore of the nacelle and landing gear attachment pins was not applied, and corrosion on the internal bore of the wing rear spar attachment pins was found. This proposed AD would require doing a detailed visual inspection of the nacelle to wing rear spar attachment pins, and the nacelle and landing gear attachment pins, for any corrosion, and doing all applicable corrective actions. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 29, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-13726, comments due Aug 13, 2021 (https://www.federalregister.gov/documents/2021/06/29/2021-13726/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by)

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