Fuel System — Potential Fuel Leak in Dry-Bay — Missing Sealant
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected DHC-8-401 and DHC-8-402 aircraft must perform a detailed visual inspection of the specified bracket assembly within 48 months or 8000 flight hours from 5 January 2026. If fuel leakage or missing sealant is found, sealant must be applied following the procedures in De Havilland Aircraft of Canada Service Bulletin 84-28-35 or approved revisions. Compliance with this directive is mandatory before further flight.
Summary
EASA Airworthiness Directive CF-2025-69 is issued for De Havilland Aircraft of Canada Limited model DHC-8-401 and DHC-8-402 aeroplanes, serial numbers 4001 and 4003 through 4633. The directive addresses a potential fuel leak in the wing dry-bay caused by missing sealant on a specific bracket assembly. It mandates inspection and sealant application to prevent fuel leakage and associated risks.
What changed
This new airworthiness directive introduces a mandatory inspection of bracket assembly Part Number 85714524-001 for fuel leakage and missing sealant. It requires applying sealant to the bracket and rivets if necessary, correcting an omission found during a previous fuel system service bulletin. The directive sets a compliance deadline within 48 months or 8000 flight hours from its effective date.
Why it matters
This directive is critical for aviation professionals because it addresses a safety risk involving potential fuel leaks that could lead to dangerous fuel vapor accumulation and risk of explosion or ignition. Operators and maintenance teams must ensure compliance to maintain aircraft airworthiness and safety. Failure to comply could result in unsafe operating conditions and regulatory penalties.
More for De Havilland Canada DHC-8
All 58- EASA AD CF-2026-47R1Wing – Wing Access Panels with Un-trimmed Stiffeners and/or Reduced Thickness - InspectionOct 13, 2026
- EASA AD CF-2026-47Wing – Wing Access Panels with Un-trimmed Stiffeners and/or Reduced ThicknessSep 28, 2026
- EASA AD CF-2026-38Maintenance Requirements Manual Part 2 - Airworthiness Limitation Items - AmendmentAug 17, 2026
- EASA AD CF-2026-37Time Limits / Maintenance Checks – Airworthiness Limitation Items – AmendmentAug 6, 2026
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