Fuselage Structure — Inspection and replacement of fuselage struts
- Published
- Effective
- Deadline
- Replaces
- CF-98-37R1
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must replace or modify fuselage struts before they reach 15 years since first installation or perform the modified inspection program as specified in Service Bulletin V2/0010 Revision NC dated 3 April 2020. Repetitive inspections of the struts and airframe lugs must be conducted per the bulletin's schedule. Any discrepancies found during inspections require immediate corrective action before further flight. Compliance is required by the effective date of 19 June 2020.
Summary
The Canadian Airworthiness Directive CF-2020-22 addresses inspection and replacement requirements for fuselage struts on Viking Air Ltd. DHC-2 Mk. I, Mk. II, and Mk. III aircraft. It mandates updated inspection procedures including visual, borescope, and non-destructive inspections to prevent structural failure caused by corrosion and damage to fuselage struts and airframe lugs. The directive also introduces improved strut part numbers with enhanced corrosion resistance.
What changed
CF-2020-22 supersedes AD CF-98-37R1 and introduces a modified inspection program requiring removal of struts for non-destructive inspection, borescope inspections, and repetitive inspections starting at 15 years since installation. It replaces previous inspection intervals and methods with more detailed procedures outlined in Viking Air Service Bulletin V2/0010 and Technical Bulletin V2/00002. The directive also permits installation of new improved strut part numbers and cancels all previous AMOCs related to the earlier AD.
Why it matters
This directive is critical for operators and maintenance organizations to ensure the structural integrity of the DHC-2 aircraft fuselage by preventing corrosion-related failures of front fuselage struts. Compliance with the updated inspection and replacement requirements reduces the risk of in-flight structural damage, enhancing safety and regulatory compliance. It also clarifies approved parts and inspection methods, aiding maintenance planning and parts procurement.
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