Federal Register #2026-22919

Proposed corrosion-safety directive for Airbus Canada BD-500 aircraft

The FAA is proposing an airworthiness directive to address wastewater-related corrosion risks on certain Airbus Canada BD-500 aircraft. - Government buyer: U.S. Department of Transportation, Federal Aviation Administration (FAA); no specific office is identified. - OEM: Airbus Canada Limited Partnership, manufacturer of the affected Model BD-500-1A10 and BD-500-1A11 airplanes. C Series Aircraft Limited Partnership (CSALP) and Bombardier, Inc. are also mentioned as prior type-certificate holders. - Affected aircraft: The FAA estimates 32 U.S.-registered airplanes would be affected; this is a safety regulation, not a purchase request. - Requirements retain corrosion inspections of the waste box, waste access doubler, and waste service door, and add inspections and applicable corrective actions for certain aircraft. Actions include repairing detected corrosion, applying corrosion protection, and applying a full secondary fuel vapor barrier. - The directive addresses wastewater-leak-related corrosion that could cause cabin-pressure leakage or serious structural damage. Transport Canada AD CF-2026-26 is incorporated by reference.

Description

The FAA proposes to supersede Airworthiness Directive 2021-13-20 for certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. The existing directive requires inspections of the waste box, waste access doubler, and waste service door for corrosion and applicable on-condition actions. The proposed directive retains those requirements and adds corrosion inspection and related actions for certain airplanes, including applying a full secondary fuel vapor barrier. Comments are due December 28, 2026.

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