Beechcraft Model 18 — Airworthiness Directives

This document is an Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA) of Australia, specifically for the Beechcraft 18 series aeroplanes. The directive outlines necessary modifications and inspections to ensure the safety and airworthiness of these aircraft. It revokes a previous directive and introduces new requirements aimed at addressing unsafe conditions related to wing structure and strap components. The document is intended for operators and maintenance personnel of Beechcraft 18 aircraft, providing detailed instructions on compliance timelines and inspection intervals to maintain airworthiness standards.

• Modify the wing by installing an external strap modification as per FAA AD 75-27-09 R2.
• Inspect wing structure and strap components at specified intervals: 300 hours for welded repairs, 1500 hours for non-welded.
• Visual inspections for cracks and corrosion must be conducted at intervals not exceeding 100 hours for certain modifications.
• The maximum gross weight for any Beech 18 variant is limited to 4490 kg (9900 lb.).
• Retirement of aircraft from service is mandated under certain conditions.