Fuel – Engine Feed Check Valve Failures
Superseded. A newer version replaces this document.
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AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must remove and replace the left and right engine feed check valves before accumulating 4000 flight hours from the directive's effective date of 2023-08-09. Subsequent replacements must occur at intervals not exceeding 3000 flight hours. All replacements must follow the procedures outlined in Airbus Canada Service Bulletin BD500-282018 or later approved revisions.
Summary
Canadian Airworthiness Directive CF-2023-59 addresses engine feed check valve failures on Airbus Canada Limited Partnership BD-500-1A10 and BD-500-1A11 aircraft models. The directive mandates replacement of the left and right engine feed check valves to prevent fuel imbalance and potential loss of fuel flow to the engines. This directive is issued under Canadian Aviation Regulation 521.427 and applies to aircraft with serial numbers 50001 and subsequent for BD-500-1A10, and 55001 and subsequent for BD-500-1A11.
What changed
This new Airworthiness Directive introduces mandatory initial and repetitive replacement of engine feed check valves at specified intervals to mitigate abnormal wear and prevent in-flight fuel imbalance. It requires compliance with Airbus Canada Service Bulletin BD500-282018 and establishes a maintenance interval of 3000 flight hours after the initial replacement. The directive is considered interim and may be followed by further actions.
Why it matters
This directive is critical for operators and maintenance organizations to ensure continued airworthiness and safety by preventing fuel system contamination and severe fuel imbalance. Compliance reduces the risk of engine fuel feed failures that could lead to engine power loss or imbalance during flight. It also provides clear maintenance instructions and intervals, aiding compliance teams in regulatory adherence.
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Get the next one by email
New ADs and bulletins for Airbus BD-500 (A220 Series), Canada Limited Partnership BD-500-1A10 and Canada Limited Partnership BD-500-1A11, summarized like this page, every Monday.