Fuselage — Cracks on Aft Wing to Body Fairing Structure
- Published
- Effective
- Replaces
- CF-2020-32R1
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform initial and repeat inspections of the aft WTBF structure, adjust tie-rod loads, and repair any cracks within specified compliance times based on aircraft groupings. They must also incorporate the structural reinforcement modifications within 12,000 flight hours as terminating actions. Maintenance records should be verified to confirm compliance with the applicable Aircraft Maintenance Publication Data Module when installing tie-rods.
Summary
Canadian Airworthiness Directive CF-2025-27 addresses cracks found on the aft wing to body fairing (WTBF) structure of Airbus Canada Limited Partnership (ACLP) Model BD-500-1A10 and BD-500-1A11 aircraft. This directive mandates inspections, load adjustments of tie-rods, and structural reinforcements to prevent loss of WTBF integrity. It applies to specific serial number ranges of these aircraft models.
What changed
AD CF-2025-27 supersedes AD CF-2020-32R1 and terminates the data reporting requirements while retaining previous inspection and adjustment mandates. It introduces mandatory incorporation of new structural reinforcement modifications via ACLP Service Bulletins BD500-538008 and BD500-538011 as terminating actions. The directive also updates compliance groups and timelines for inspections and rework.
Why it matters
This directive is critical for maintaining the structural integrity of the aft WTBF, preventing potential in-flight damage, loss of radio altimeter function, and adverse effects on aircraft stability and performance. Operators and maintenance organizations must comply to ensure continued airworthiness and regulatory compliance. Failure to address these cracks could lead to safety risks and regulatory penalties.
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- EASA AD CF-2026-45Wings – Discrepant Fasteners at Wing to Fuselage Joint - AmendmentSep 11, 2026
- EASA AD CF-2026-40Time Limits/Maintenance Checks – New and Revised Airworthiness Limitations TasksSep 2, 2026
- EASA AD CF-2026-36Fuselage – Skin Assembly – Discrepant Fasteners at Air Data System Probe Doubler - Replacement
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