Non-Conforming Wing-to-Fuselage Attachment Nuts
- Published
- Effective
- Replaces
- CF-2012-10
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform initial detailed visual inspections of specified wing-to-fuselage attachment nuts within 3000 flight hours or 18 months from the original AD effective date for certain serial numbers, or within 8800 flight hours for others, as detailed in the directive. Periodic inspections of the front keel beam support nuts must continue every 8800 flight hours. If any cotter pins are missing or damaged, Bombardier must be contacted for approved corrective actions before returning the aircraft to service.
Summary
The Canadian Airworthiness Directive CF-2012-10R1 addresses non-conforming wing-to-fuselage attachment nuts on Bombardier aircraft models CL-600-2C10, CL-600-2D15, CL-600-2D24, and CL-600-2E25. It mandates inspections of specific wing-to-fuselage attachment nuts that lack the required double locking feature, which could lead to nut loosening and potential wing detachment. This directive applies to aircraft with serial numbers starting from 10002 for CL-600-2C10, 15001 for CL-600-2D15 and CL-600-2D24, and 19001 for CL-600-2E25.
What changed
This revision CF-2012-10R1 replaces the original AD CF-2012-10 issued in 2012. It modifies inspection requirements by maintaining initial inspections at six attachment points but removes periodic inspections for most joints except those on the front keel beam support. It also introduces different periodic inspection intervals and updates applicability to reflect production changes.
Why it matters
This directive is critical for aviation professionals to ensure the structural integrity of wing attachments on affected Bombardier aircraft. Failure to comply could result in loosening of critical fasteners, risking wing detachment and catastrophic failure. Operators, maintenance organizations, and compliance teams must understand and implement the inspection requirements to maintain airworthiness and safety.
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