Data / Federal rules / 2026-18956
Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
The Federal Aviation Administration published this proposed rule in the Federal Register on September 16, 2026. Comments are due by November 2, 2026.
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What the agency says
The FAA proposes to adopt a new airworthiness directive (AD) for certain De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Model DHC-8-401 and DHC-8-402 airplanes. This proposed AD was prompted by a report that instructions for fay, fillet, and rivet dome sealing were omitted for a bracket installed on the inboard surface of the tank rib, which could allow fuel to leak from the wing fuel tank into the wing dry bay. This proposed AD would require a detailed visual inspection of the affected bracket assembly for signs of fuel leakage and for the presence of fillet seal and fastener dome seal, and applicable on-condition actions. The FAA is proposing this AD to address the unsafe condition on these products.
Key facts
- Document number
- 2026-18956
- Type
- Proposed rule
- Action
- Notice of proposed rulemaking (NPRM)
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- September 16, 2026
- Comments due
- November 2, 2026
- Dates
- The FAA must receive comments on this proposed AD by November 2, 2026.
- Docket
- Docket No. FAA-2026-8810; Project Identifier MCAI-2025-01847-T
- Regulation ID (RIN)
- 2120-AA64
- Code of Federal Regulations
- 14 CFR 39
- Topics
- Air transportation; Aircraft; Aviation safety; Incorporation by reference; Safety
- Pages
- 3
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Everything from the Federal Aviation Administration · Rules on air transportation · Rules on aircraft · Rules on aviation safety · Published in September 2026
Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.