# Proposed AD FAA-2024-2420: De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2025-05-06
- Products: De Havilland Aircraft of Canada
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 12, 2024, 89 FR 88910
- Comments due: December 27, 2024
- Became: [AD 2025-05-06](https://openairdocs.org/ad/2025-05-06)
- Docket: FAA-2024-2420 (https://www.regulations.gov/docket/FAA-2024-2420, where comments are filed)
- Project: MCAI-2024-00143-T
- FR document: 2024-25982
- Official PDF: https://openairdocs.org/files/sha256/7e/cc/7ecc4152d78b1df9926d498309b2430b8c99cd1b4f47ab042d3e24fa3ac09e63 (from https://www.govinfo.gov/content/pkg/FR-2024-11-12/pdf/2024-25982.pdf)
- Federal Register: https://www.federalregister.gov/documents/2024/11/12/2024-25982/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2024-25982-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2024-2420

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2022-01-02, which applies to certain De Havilland Aircraft of Canada Limited Model DHC-8-400, -401, and -402 airplanes. AD 2022-01-02 requires inspecting for corrosion of the nacelle to wing rear spar attachment pins, and the nacelle to landing gear attachment pins, and doing all applicable corrective actions. Since the FAA issued AD 2022- 01-02, it was discovered that some operators were unable to identify the airplanes subject to each requirement. This proposed AD would continue to require the actions specified in AD 2022-01-02, clarify the affected airplanes for each required action, and revise the applicability by removing Model DHC-8-400 airplanes, as specified in a Transport Canada AD, which is proposed for incorporation by reference (IBR). This proposed AD would also revise a certain compliance time. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Nov 12, 2024: Notice of proposed rulemaking (NPRM). (first notice), FR document 2024-25982, comments due Dec 27, 2024 (https://www.federalregister.gov/documents/2024/11/12/2024-25982/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by)

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