Electrical Power - Variable Frequency Generator Harness Low Clearance to Hydraulic/Fuel Lines
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Bombardier BD-700-1A10 and BD-700-1A11 aircraft must modify the routing of the VFG cables and hydraulic/fuel lines according to the specified Bombardier Service Bulletins within 24 months of the directive's effective date. Aircraft that have already incorporated the relevant service bulletin through Bombardier's Service Request meet the directive's requirements. Contact Transport Canada or Bombardier for further guidance if needed.
Summary
Canadian Airworthiness Directive CF-2018-22 addresses a safety concern on Bombardier Inc. model BD-700-1A10 and BD-700-1A11 aeroplanes, serial numbers 9001 through 9831 and 9998. The directive focuses on the electrical power system, specifically the low clearance between Variable Frequency Generator (VFG) harnesses and hydraulic/fuel lines in the Aft Equipment Bay. It mandates modifications to ensure proper clearance to prevent potential chafing and associated risks.
What changed
This new Airworthiness Directive introduces a requirement to modify the routing of the VFG power feeder cables and harnesses to maintain adequate clearance from hydraulic and fuel lines. The directive references specific Bombardier Service Bulletins that provide detailed instructions for the modification. It also recognizes prior incorporation of one of these service bulletins through a Bombardier Service Request as compliant with the AD.
Why it matters
This directive is critical for aviation professionals as it addresses a potential safety hazard that could lead to hydraulic or fuel leaks and electrical arcing, increasing the risk of in-flight fire. Operators and maintenance organizations must ensure compliance to maintain aircraft airworthiness and safety. Compliance helps prevent costly damage and operational disruptions caused by electrical or hydraulic system failures.
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