EASA AD CF-2024-26
SUPERSEDED BY TCCA AD CF-2025-61
Summary
Canadian Airworthiness Directive CF-2024-26 addresses corrosion and wear issues on the slat tracks of Airbus Canada Limited Partnership aeroplanes, specifically models BD-500-1A10 and BD-500-1A11. The directive mandates inspections, cleaning, greasing, and repairs of slat tracks to prevent potential structural damage caused by slat panel loss. It applies to aircraft with serial numbers R50001 and subsequent for BD-500-1A10, and 55001 and subsequent for BD-500-1A11.
What Changed
AD CF-2024-26 supersedes AD CF-2021-43 by requiring the use of a revised service bulletin that includes rework non-destructive testing inspections on slat tracks previously repaired with inappropriate methods. It incorporates a global alternative means of compliance allowing inspections limited to visible slat track portions and cancels the mandatory reporting requirement from the previous AD. The directive also clarifies inspection procedures and access requirements for maintenance.
Why It Matters
This directive is critical for operators and maintenance organizations to prevent catastrophic wing damage due to slat track corrosion and wear. It ensures that previously undetected cracks are identified and repaired using appropriate inspection methods, enhancing flight safety. Compliance with the updated inspection and maintenance intervals helps maintain aircraft airworthiness and regulatory compliance.
What To Do
Operators must clean, inspect, grease, and repair slat tracks according to the revised service bulletin BD500-574001 Issue 002 or later approved revisions. Initial compliance depends on accumulated air time, with deadlines ranging from before 2550 to 4000 total hours or within 850 hours air time from the effective date of 2024-07-31. Subsequent inspections and maintenance must occur at intervals not exceeding 2550 hours air time.