# Proposed AD FAA-2024-0756: De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2024-12-05
- Products: De Havilland Aircraft of Canada
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 22, 2024, 89 FR 20367
- Comments due: May 6, 2024
- Became: [AD 2024-12-05](https://openairdocs.org/ad/2024-12-05)
- Docket: FAA-2024-0756 (https://www.regulations.gov/docket/FAA-2024-0756, where comments are filed)
- Project: MCAI-2023-00549-T
- FR document: 2024-05963
- Official PDF: https://openairdocs.org/files/sha256/d4/d4/d4d43b31bf2c0298529385a6f8494d1d6484e9f16e14a7d11750b718bddd645e (from https://www.govinfo.gov/content/pkg/FR-2024-03-22/pdf/2024-05963.pdf)
- Federal Register: https://www.federalregister.gov/documents/2024/03/22/2024-05963/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2024-05963-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2024-0756

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2021-25-12 and AD 2022-11-11, which apply to certain De Havilland Aircraft of Canada Limited Model DHC-8-401 and -402 airplanes. AD 2021- 25-12 requires repetitive lubrications of the trailing arm of the nose landing gear (NLG). AD 2021-25-12 also requires revising the existing maintenance or inspection program to include new and revised airworthiness limitations. AD 2022-11-11 requires a modification to the NLG shock strut assembly. Since the FAA issued AD 2021-25-12 and AD 2022-11-11, it has been determined that the pivot pin and tow fitting assembly of the NLG must be replaced. This proposed AD would continue to require the actions specified in AD 2021-25-12 and AD 2022-11-11 and would require replacement of the pivot pin and tow fitting assembly with a new, improved pivot pin and tow fitting assembly and prohibit the installation of affected parts. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Mar 22, 2024: Notice of proposed rulemaking (NPRM). (first notice), FR document 2024-05963, comments due May 6, 2024 (https://www.federalregister.gov/documents/2024/03/22/2024-05963/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by)

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