Fuselage – Skin Assembly – Discrepant Fasteners at Air Data System Probe Doubler - Replacement
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Airbus Canada BD-500-1A10 and BD-500-1A11 aircraft with serial numbers in the specified ranges must remove and replace the discrepant aluminum rivets with titanium Hi-Lite fasteners on the Air Data System Probe upper doubler. This work must be completed within 17,500 flight cycles from the AD's effective date, following the procedures outlined in ACLP Service Bulletin BD500-531016 Issue 001 or approved revisions.
Summary
Canadian Airworthiness Directive CF-2026-36 addresses discrepant fasteners in the fuselage skin assembly of Airbus Canada Limited Partnership BD-500-1A10 and BD-500-1A11 aircraft. The directive focuses on the replacement of incorrectly installed aluminum rivets at the Air Data System Probe doubler with titanium Hi-Lite fasteners to ensure structural integrity. This AD applies to specific serial numbers of these aircraft models.
What changed
CF-2026-36 introduces a new requirement to remove aluminum rivets from the upper doubler of the Air Data System Probe on both left and right sides of the fuselage and replace them with titanium Hi-Lite fasteners. This action corrects a design issue discovered during a review that could compromise structural strength during a bird strike. The directive mandates compliance within a specified number of flight cycles.
Why it matters
This directive is critical for maintaining the structural safety of affected Airbus Canada BD-500 aircraft, preventing potential partial detachment of the doubler during bird strikes. Operators, maintenance organizations, and compliance teams must address this to avoid unsafe conditions and ensure regulatory compliance. Failure to comply could lead to operational restrictions or safety risks.
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