Fuel Distribution — Twisted Motive Flow (MF) Flexible Fuel Line
- Published
- Effective
- Replaces
- 2021-09
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must inspect and, if necessary, replace the left and right MF fuel line assemblies following ACLP Service Bulletin BD500-282011, Issue 002, within four months of the AD's effective date for Group 1 aircraft, and within four months of the previous AD CF-2021-09 effective date for Group 2 aircraft. Compliance with earlier inspections and replacements per Issue 001 of the service bulletin also satisfies this AD. Contact Transport Canada for further guidance if needed.
Summary
Canadian Airworthiness Directive CF-2025-47 addresses the fuel distribution system on Airbus Canada Limited Partnership (ACLP) aircraft models BD-500-1A10 and BD-500-1A11. It focuses on the twisted Motive Flow (MF) flexible fuel line assemblies installed in the pylon to wing area, which could lead to fuel leaks and fire risks. This directive applies to specific serial numbers of these aircraft models.
What changed
CF-2025-47 supersedes AD CF-2021-09 and expands its applicability by adding four additional BD-500-1A11 aircraft serial numbers. It retains the inspection and corrective action requirements for twisted or damaged MF fuel lines and introduces updated compliance timelines based on aircraft grouping. The directive also references a newer service bulletin for inspection and replacement procedures.
Why it matters
This directive is critical for aviation professionals to prevent potential fuel leaks caused by abrasion of twisted MF flexible fuel lines, which pose a fire hazard due to nearby electrical harness connectors. Operators and maintenance teams must ensure compliance to maintain aircraft airworthiness and safety. Failure to comply could result in unsafe flight conditions and regulatory penalties.
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