EASA AD CF-2024-37
Fuel Distribution — Fuel Transfer Valve — Fuel Transfer Float Valve Failed in Closed Position
Summary
The Canadian Airworthiness Directive CF-2024-37 addresses a critical issue with the fuel transfer float valves on Airbus Canada Limited Partnership BD-500-1A10 and BD-500-1A11 aircraft approved for ETOPS operations. This directive mandates the replacement of existing fuel transfer float valves that may fail in the closed position, potentially preventing fuel transfer between the center and wing tanks. The AD aims to ensure safe fuel distribution during extended-range twin-engine operations.
What Changed
CF-2024-37 introduces a new requirement to remove and replace the affected fuel transfer float valves with improved versions on BD-500-1A10 and BD-500-1A11 aircraft used in ETOPS. It establishes a compliance deadline of 7,500 flight hours or 36 months from the effective date for completing the replacement. Additionally, it allows compliance by updating the ETOPS Configuration, Maintenance and Procedures documentation as an alternative means.
Why It Matters
This directive is critical for aviation professionals because failure of both fuel transfer float valves in the closed position can lead to fuel starvation during ETOPS flights, posing a serious safety risk. Operators and maintenance teams must ensure compliance to prevent in-flight fuel imbalance and potential diversions. The AD impacts maintenance planning and ETOPS operational approvals, requiring timely valve replacement to maintain airworthiness.
What To Do
Operators of Airbus Canada BD-500-1A10 and BD-500-1A11 aircraft approved for ETOPS must replace the fuel transfer float valves within 7,500 flight hours or 36 months from November 18, 2024, whichever occurs first. Compliance can be achieved by following ACLP Service Bulletin BD500-282017 or by updating the ETOPS Configuration, Maintenance and Procedures documentation as specified. Operators should coordinate with maintenance providers to schedule and document the valve replacements accordingly.