Wings — Cracking and Corrosion of Aileron Internal Structure
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Viking DHC-6 series aircraft must perform the Special Detailed Inspection within six months if the ailerons have 16,000 or more flight hours, 32,000 or more flight cycles, or 10 or more years in service. For ailerons below these thresholds, inspections must be done within six months of reaching any of these limits. Any damage found must be repaired or parts replaced before further flight, and inspection results must be reported to Viking within 30 days.
Summary
The Canadian Airworthiness Directive CF-2020-05 addresses cracking and corrosion issues in the aileron internal structure of Viking Air Ltd. DHC-6 series aircraft, including all series from 1 through 400. This directive mandates inspections and corrective actions to ensure the structural integrity of the ailerons on these aircraft models.
What changed
This new Airworthiness Directive introduces a one-time Special Detailed Inspection of the aileron internal structure, including spars, ribs, and skins, to detect cracks, corrosion, or other damage. It also requires repair or replacement of any damaged parts and mandates reporting inspection results to Viking Air Ltd. for further assessment.
Why it matters
This directive is critical for aviation professionals because undetected cracks or corrosion in the aileron internal structure can lead to loss of aileron control and potential flight safety hazards. Operators and maintenance organizations must comply to prevent progressive structural damage and ensure continued airworthiness of affected Viking DHC-6 aircraft.
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