Fuel Distribution — Motive Flow Fuel-feed Tubes Damaged at Bonding Clamp and Clamp Block Locations Inside the Fuel Tank
- Published
- Effective
- Replaces
- 2022-70
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform initial and repetitive operational checks of the gravity cross flow shut-off valve within 930 flight hours from January 4, 2023, inspect and rectify motive flow fuel-feed tubes within 9800 flight hours, and replace saddle clamps within the same timeframe. Compliance must follow the instructions in ACLP Service Bulletins BD500-282012, BD500-282015, and BD500-282021 as approved by Transport Canada.
Summary
Airworthiness Directive CF-2025-24 addresses damage to motive flow fuel-feed tubes at bonding clamp and clamp block locations inside the fuel tank on Airbus Canada Limited Partnership (ACLP) aircraft models BD-500-1A10 and BD-500-1A11. This directive mandates inspections, operational checks, and replacement of saddle clamps to prevent fuel imbalance issues during flight. It applies to specific serial numbers starting from 50001 for BD-500-1A10 and 55001 for BD-500-1A11 models.
What changed
CF-2025-24 supersedes AD CF-2022-70 and introduces new requirements including the replacement of saddle clamps on motive flow fuel-feed tubes and inspections at bonding clamp locations, which were not addressed in the previous directive. It retains earlier operational check requirements and adds compliance with ACLP Service Bulletin BD500-282021.
Why it matters
This directive is critical for maintaining fuel system integrity and preventing fuel imbalances that can reduce aircraft functional capabilities and increase pilot workload. Compliance ensures continued airworthiness and safety by addressing previously unmitigated damage risks in the fuel-feed tubes. Operators and maintenance teams must follow these updated procedures to avoid in-flight fuel system failures.
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