Home / Agencies / DOT / 2026-11217
Final Rule

Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes

Agency
DOT
Document Number
2026-11217
Published
June 4, 2026
Effective Date
July 9, 2026

Abstract

The FAA is adopting a new airworthiness directive (AD) for all De Havilland Aircraft of Canada Limited Model DHC-8 airplanes. This AD was prompted by reports of cracked barrel nuts at the wing front spar and horizontal stabilizer to vertical stabilizer joint. This AD requires repetitive inspections for cracking and corrosion of the affected barrel nuts and applicable corrective actions. The FAA is issuing this AD to address the unsafe condition on these products.

Federal Register Source

This document is published by the Office of the Federal Register, National Archives and Records Administration. Access the full regulatory text, preamble, and docket comments below.

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Frequently Asked Questions

What is the 2026-11217 Federal Register document?
Document 2026-11217 is a Final Rule published by the Department of Transportation in the Federal Register on June 4, 2026, with an effective date of July 9, 2026. The FAA is adopting a new airworthiness directive (AD) for all De Havilland Aircraft of Canada Limited Model DHC-8 airplanes. This AD was prompted by reports of cracked barrel nuts at the wing front spar and horizontal stabilizer to vertical stabilizer joint. This AD requires repetitive inspections for cracking and corrosion of the affected barrel nuts and applicable corrective actions. The FAA is issuing this AD to address the unsafe condition on these products. View the original at https://www.federalregister.gov/documents/2026/06/04/2026-11217/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by.
Is document 2026-11217 an economically significant rule?
No. Document 2026-11217 is not classified as economically significant under Executive Order 12866. Economically significant rules require OIRA review and are estimated to have impacts of $100 million or more per year.

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