Stabilizers — Vertical Stabilizer Leading Edge Missing Clad Material
- Published
- Effective
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What to do
Operators must perform a general visual inspection within 6 months of the directive's effective date or within 12 months of the aeroplane entering service, whichever is later, and repeat inspections every 12 months or 500 flight hours. Any corrosion found must be removed, tested, and treated with protective coating as specified in the applicable Bombardier Service Bulletin. Replacement of the vertical stabilizer leading edge is an optional terminating action to these inspection requirements.
Summary
Canadian Airworthiness Directive CF-2025-57 addresses an issue with Bombardier Inc. model BD-700-2A12 aeroplanes, specifically serial numbers 70153 and 70160 through 70189. The directive concerns missing clad material on the vertical stabilizer leading edge, which can lead to corrosion and potential loss of structural integrity. It mandates inspections and protective coatings until the affected part is replaced.
What changed
This new Airworthiness Directive introduces mandatory initial and repetitive inspections of the vertical stabilizer leading edge for corrosion, along with the application of a protective coating. It also provides an optional terminating action involving replacement of the vertical stabilizer leading edge. The directive references Bombardier Service Bulletin 700-55-7501 Revision 01 for compliance procedures.
Why it matters
This directive is critical for maintaining the structural integrity of the vertical stabilizer, which is essential for safe flight control. Corrosion due to missing clad material can compromise the stabilizer's ability to withstand bird strikes and may damage hydraulic or electrical systems. Compliance ensures continued airworthiness and prevents potential flight control failures.
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