Insufficient Clearance Between Engine Fuel-Feed Line and Collector Tank Upper Skin Stringer
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Owners, operators, and maintenance personnel of affected BD-700-2A12 aircraft should inspect for insufficient clearance and damage as prescribed in Bombardier Service Bulletin 700-28-7508 Basic Issue dated 10 December 2025 or any later revisions. If issues are found, replace the existing parts with newly designed components. No explicit compliance deadline is stated, but actions should be taken promptly following the issuance of the service bulletin.
Summary
The Transport Canada Civil Aviation Safety Alert CASA 2026-02 addresses an insufficient clearance issue between the engine fuel-feed line and the upper skin stringer of the right-hand side collector tank on Bombardier Inc. BD-700-2A12 aircraft. This safety alert raises awareness of the potential risk of sparks inside the collector tank due to this clearance issue and recommends corrective actions. The alert applies specifically to BD-700-2A12 aeroplanes with serial numbers 70006 through 70133, 70135 through 70144, and 70153.
What changed
This new safety alert introduces the identification of an insufficient clearance condition discovered during routine inspections on the final assembly line. It mandates inspections and, if necessary, replacement of affected parts with newly designed components as detailed in Bombardier Service Bulletin 700-28-7508 Basic Issue dated 10 December 2025. The alert formalizes the recommended inspection and corrective procedures to mitigate the identified risk.
Why it matters
This issue is critical for aviation professionals because insufficient clearance combined with certain conditions may cause sparks inside the fuel collector tank, posing a fire hazard and potential damage to the fuel-feed tube assembly. Operators, maintainers, and compliance teams must address this to ensure continued airworthiness and safety of affected BD-700-2A12 aircraft. Timely compliance reduces the risk of in-flight fuel system failures and enhances overall operational safety.
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