Wings — Low Clearance Between Fuel Vent Tube Installation and Surrounding Systems and Structures in Right Wing
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Bombardier BD-700-2A12 aircraft with serial numbers 70005 through 70179 must complete the required inspections and corrective actions within 1500 flight hours or 72 months from the effective date of 15 October 2025, whichever occurs first. They must use Bombardier Service Bulletin 700-57-7537 Revision No. 01 or later approved revisions to rectify low clearance conditions in bays 3, 18, and 20 of the right wing. Any low clearance found during inspections must be corrected before further flight.
Summary
Airworthiness Directive CF-2025-49 addresses low clearance issues between the fuel vent tube installation and surrounding systems in the right wing of Bombardier Inc. model BD-700-2A12 aeroplanes, serial numbers 70005 through 70179. The directive mandates corrective actions to prevent potential ignition sources in the fuel tank caused by lightning strikes. It requires compliance with Bombardier Service Bulletin 700-57-7537 Revision No. 01 or later approved revisions.
What changed
This new Airworthiness Directive introduces mandatory inspections and rectifications to address low clearance conditions between the fuel line flexible coupling, hydraulic system lines, and fuel vent tube in the right wing of affected Bombardier BD-700-2A12 aircraft. It requires operators to follow specific procedures outlined in Bombardier SB 700-57-7537 to eliminate the risk of fuel tank ignition due to lightning strikes.
Why it matters
This directive is critical for aviation professionals to ensure the continued airworthiness and safety of affected Bombardier BD-700-2A12 aircraft. Addressing these low clearance conditions reduces the risk of ignition sources in the fuel tank during lightning events, thereby enhancing flight safety. Operators, maintenance organizations, and compliance teams must integrate these requirements into their maintenance programs to meet regulatory obligations and avoid operational disruptions.
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