Federal Register #2026-10486

FAA Airworthiness Directive for Airbus Canada BD-500-1A10 and BD-500-1A11 Aircraft

This summary covers a Federal Aviation Administration (FAA) airworthiness directive for Airbus Canada BD-500-1A10 and BD-500-1A11 aircraft: - Government Buyer: - Federal Aviation Administration (FAA), Aircraft Certification Service, Continued Operational Safety Branch - OEMs and Vendors Mentioned: - Airbus Canada Limited Partnership (OEM) - C Series Aircraft Limited Partnership (CSALP) (previous type certificate holder) - Bombardier, Inc. (previous type certificate holder) - Transport Canada (regulatory authority) - European Union Aviation Safety Agency (EASA) (regulatory authority) - Products/Services Requested: - Identification and replacement of incorrectly installed titanium fasteners (P/N B0206003GD) in the butt strap at the outer wing box lower skin to center wing box interface with correct nickel alloy fasteners (P/N B0206033GD) - Inspection and installation of fire-resistant sleeves on Environmental Control System (ECS) ducts (P/Ns D761189105, D761189501, D762232509) made from non-compliant material APF11807781 - Re-identification of ceiling panel liners as part of fire safety compliance - Unique or Notable Requirements: - Compliance with referenced international airworthiness directives (EASA, Transport Canada) - Inspections required before 10,000 total flight cycles or within 500 flight cycles from the effective date, whichever is later - Possible warranty coverage for corrective actions - No specific procurement of products or services; directive is regulatory and applies to aircraft operators - Key Technical Details: - Focus on safety-critical fastener and ECS duct material compliance to prevent structural damage, fuel leaks, and uncontrolled fires - All corrective actions must be performed in accordance with referenced regulatory materials

Description

This final rule airworthiness directive (AD) issued by the Federal Aviation Administration (FAA) addresses the incorrect installation of titanium fasteners in the butt strap at the outer wing box lower skin to center wing box interface on certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. The AD requires identification of the fasteners installed in this area and applicable on-condition actions to ensure safety. The directive is effective July 1, 2026, and aims to correct an unsafe condition on these aircraft. The FAA estimates the cost of required actions and potential on-condition actions, with some costs possibly covered under warranty.

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