CESSNA 402C — Airworthiness Directives

This document is an Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority of Australia, specifically addressing the Cessna 400 Series Aeroplanes, including the Cessna 402C. The directive outlines requirements for inspecting and repairing corrosion, disbonds, and deficient sealing between the wing skins and spars and/or ribs. It emphasizes the importance of maintaining the structural integrity of the aircraft wings to ensure safety and longevity. The directive mandates compliance inspections and repairs in accordance with specified service bulletins, with a focus on preventing moisture ingress that can lead to corrosion and reduced fatigue life of the wing components. The document is crucial for operators and maintenance personnel to ensure ongoing airworthiness and compliance with safety regulations.

• Inspect for corrosion and disbonds in wing structures as per Cessna Service Bulletin MEB95-11 Revision 1.
• Initial inspection must be completed by 2 July 1997 or 200 hours after 2 January 1997.
• Reinspections are required at intervals defined in the service bulletin.
• Corrosion can significantly reduce the fatigue life of the wing spar.
• The directive applies to multiple Cessna 400 series models, including the Cessna 402C.