Fuselage — Non-Conforming Keel Tension Fittings and Stringer End Fittings
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform a detailed visual inspection of the keel tension and stringer end fittings within 8000 flight hours or 5 years from March 4, 2019. If non-conformances are found, repairs must be coordinated with Bombardier before further flight. Additionally, all affected fittings must be replaced before reaching 40,000 total flight cycles, following the approved service bulletins and instructions.
Summary
The Canadian Airworthiness Directive CF-2019-06 addresses non-conforming keel tension fittings and stringer end fittings on Bombardier Inc. DHC-8-401 and DHC-8-402 aircraft with specific serial numbers. This directive mandates inspections and eventual replacement of these fittings to ensure structural integrity of the fuselage. It applies to affected aircraft to prevent premature cracking and corrosion in critical fuselage joints.
What changed
CF-2019-06 introduces a new regulatory requirement for a one-time detailed visual inspection of the specified fittings within 8000 flight hours or 5 years, whichever occurs first, followed by mandatory replacement of the non-conforming parts before 40,000 total flight cycles. It also clarifies that compliance with a previous service bulletin does not satisfy the inspection requirement and requires rework for certain aircraft that incorporated an earlier service bulletin.
Why it matters
This directive is crucial for operators and maintenance organizations to prevent structural failures caused by premature cracking and corrosion in fuselage fittings. Compliance ensures continued airworthiness and safety of the affected Bombardier DHC-8-400 series aircraft. It also helps maintenance teams plan inspections and part replacements within specified timelines to avoid grounding or operational disruptions.
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