EASA AD CF-2025-39
Wings — Oversized Holes in Rib 6
Summary
Canadian Airworthiness Directive CF-2025-39 addresses an issue with oversized holes in rib 6 of the wings on Bombardier Inc. model BD-700-2A12 aeroplanes, specifically serial numbers 70042 through 70074, 70079, and 70080. The directive mandates inspection and potential rework of fasteners and fastener holes to ensure structural integrity. This AD aims to prevent fuel leakage and potential structural failure due to cracks in the wing rib shear-ties.
What Changed
CF-2025-39 introduces a new requirement for inspecting and reworking fasteners and holes at rib 6 on affected Bombardier BD-700-2A12 aircraft. It establishes compliance deadlines and references Bombardier Service Bulletin 700-57-7525 for the corrective procedures. This directive is a new regulation responding to identified production defects and fatigue risks.
Why It Matters
This directive is critical for aviation professionals because it addresses a structural safety concern that could lead to fuel leakage and potential wing structural failure. Operators and maintenance organizations must comply to maintain aircraft airworthiness and prevent in-service failures. Compliance ensures continued safe operation and adherence to Canadian Aviation Regulations.
What To Do
Operators of affected Bombardier BD-700-2A12 aircraft must inspect and, if necessary, rework the fasteners and holes at rib 6 within 40 months from August 21, 2025, or within 1400 flight cycles from October 26, 2022, whichever occurs first. The work must follow Bombardier Service Bulletin 700-57-7525 Revision 01 or later approved revisions. Completing the required actions before the effective date also satisfies the directive.