Fuselage – Corrosion on Waste Box, Waste Access Doubler and Waste Service Door of Aft Waste Service Port
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected ACLP BD-500-1A10 and BD-500-1A11 aircraft must inspect the waste tank, access doubler, and service door for corrosion, repair any findings, and apply protective coatings according to the revised Service Bulletin BD500-536004. Compliance deadlines vary by aircraft group, with initial inspections required within specified flight cycles or months from manufacture, and additional actions within 9800 flight hours after the directive's effective date. Prior compliance with earlier service bulletin editions may satisfy some requirements.
Summary
The Canadian Airworthiness Directive CF-2026-26 addresses corrosion issues on the waste box, waste access doubler, and waste service door of the aft waste service port on Airbus Canada Limited Partnership (ACLP) aircraft models BD-500-1A10 and BD-500-1A11. This directive mandates inspections, repairs, and application of protective coatings to prevent structural damage caused by corrosion. It applies to aircraft with specific serial numbers ranging from 50001 to 50047 for BD-500-1A10 and 55001 to 55063 for BD-500-1A11.
What changed
CF-2026-26 replaces the previous directive CF-2020-42 and introduces mandatory compliance with the revised Service Bulletin BD500-536004, including a new Part B with additional repair and protection requirements. The updated directive removes the use of corrosion inhibiting compound (CIC) and requires full application of a secondary fuel vapor barrier (SVFB) on the waste tank. It also mandates further repairs and sealant replacements for certain aircraft that have already complied with earlier instructions.
Why it matters
This directive is critical for aviation professionals to prevent corrosion-related structural failures that could lead to cabin pressure loss or catastrophic damage. Operators and maintenance organizations must ensure timely inspections and repairs to maintain airworthiness and regulatory compliance. The enhanced protective measures reduce long-term corrosion risks, improving aircraft safety and reliability.
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