# Proposed AD FAA-2025-0482: De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2025-19-05
- Products: De Havilland Aircraft of Canada
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 23, 2025, 90 FR 26466
- Comments due: August 7, 2025
- Became: [AD 2025-19-05](https://openairdocs.org/ad/2025-19-05)
- Docket: FAA-2025-0482 (https://www.regulations.gov/docket/FAA-2025-0482, where comments are filed)
- Project: MCAI-2024-00152-T
- FR document: 2025-11417
- Official PDF: https://openairdocs.org/files/sha256/8b/e0/8be0cc2320c12c8d36952b4f082657ebdd201ea7df5a92508d1f2853fb36ab7f (from https://www.govinfo.gov/content/pkg/FR-2025-06-23/pdf/2025-11417.pdf)
- Federal Register: https://www.federalregister.gov/documents/2025/06/23/2025-11417/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2025-11417-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2025-0482

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2019-16-09, which applies to certain De Havilland Aircraft of Canada Limited Model DHC-8-400 series airplanes. AD 2019-16-09 requires one- time inspections for cracks and damage of the elevator power control unit (PCU) brackets and surrounding area, horizontal stabilizer rear spar, and elevator front spar, and related investigative and corrective actions if necessary. Since the FAA issued AD 2019-16-09, new findings have been reported as a result of maintenance activities and/or inspections. This proposed AD would continue to require certain actions in AD 2019-16-09, and would also require repeating the inspections one time and performing applicable on-condition actions, remove an airplane from the applicability, and provide optional terminating action for the repetitive inspections. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 23, 2025: Notice of proposed rulemaking (NPRM). (first notice), FR document 2025-11417, comments due Aug 7, 2025 (https://www.federalregister.gov/documents/2025/06/23/2025-11417/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by)

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