Cessna 120 — Ad

This document is an Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority of Australia concerning the Cessna 120 and 140 series aeroplanes. The directive outlines necessary inspections and maintenance actions required to ensure the safety and airworthiness of the wing drag wire system. It mandates that all Model 120 and 140 aircraft undergo specific inspections for loose or broken drag wires and damage to wing ribs. The document emphasizes compliance within a specified timeframe to mitigate any potential safety risks associated with the wing structure.

• Inspect wing drag wire system for loose or broken wires and damage to ribs.
• Install inspection openings if not already present, specifically aft of the rear spar near Rib 5 and Rib 10.
• Re-rig loose drag wires and replace broken ones with specified sizes (No. 6 to No. 8).
• Buckling of intermediate rib flanges is not immediately disqualifying, but reinforcement is recommended.
• Compliance is required within 100 hours or 12 months after May 15, 2003.