EASA AD CF-2025-09
Wings — Discrepant Fasteners at Wing to Fuselage Joint
Summary
Canadian Airworthiness Directive CF-2025-09 addresses discrepant fasteners at the wing to fuselage joint on Airbus Canada Limited Partnership (ACLP) aircraft models BD-500-1A10 and BD-500-1A11. The directive identifies incorrect installation of titanium fasteners instead of the specified nickel alloy fasteners at the outer wing box lower skin to centre wing box interface. This AD mandates inspection and corrective actions to ensure structural integrity and safety.
What Changed
CF-2025-09 introduces a new requirement to inspect the fasteners at the wing to fuselage joint on specified ACLP BD-500 series aircraft. It requires identification of fastener types within 500 flight cycles or before 10,000 flight cycles, whichever is later, and mandates repair or replacement if incorrect fasteners are found. This is a new regulation addressing a recently discovered assembly issue.
Why It Matters
This directive is critical for maintaining the structural strength of the wing to fuselage joint, preventing potential fatigue damage and fuel leaks caused by incorrect fasteners. Operators and maintenance organizations must comply to avoid compromised airworthiness and ensure continued safe operation of affected aircraft. Compliance teams need to track inspection and repair deadlines to meet regulatory requirements.
What To Do
Operators of affected ACLP BD-500-1A10 and BD-500-1A11 aircraft must inspect the fasteners at the specified wing joint within 500 flight cycles from March 10, 2025, or before 10,000 total flight cycles, whichever is later. If non-serviceable fasteners are found or identification is not possible, they must contact ACLP for approved repair instructions and complete the repairs before further flight. All actions must follow the ACLP Service Bulletin BD500-571004 procedures or approved alternatives.