Cessna 177 Cardinal — Airworthiness Directives

This document is an Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority of Australia, specifically addressing the Cessna 177 series aeroplanes. It outlines mandatory inspection and compliance requirements for the wing main spar carry-through section due to concerns about corrosion that could compromise structural integrity. The directive applies to all models within the Cessna 177 series and emphasizes the importance of regular inspections to ensure safety and airworthiness. The document provides specific timelines for compliance based on the age of the aircraft, ensuring that necessary inspections are conducted in a timely manner to prevent potential failures.

• All models of Cessna 177 series aeroplanes are affected by this directive.
• Immediate inspection is required for aircraft over ten years old.
• Aircraft under ten years must be inspected before reaching that age.
• Post-initial inspection, aircraft must be checked every six years, or every twelve years if a corrosion protection scheme is used.
• Corrosion in the wing spar carry-through forging can compromise structural integrity.