Beechcraft 76 Duchess — Airworthiness Directives

This document is a Schedule of Airworthiness Directives for the Beechcraft 76 Duchess Series Aeroplanes, specifically addressing the engine mount support structure. It outlines the requirements for visual inspections of the engine mount channels to ensure safety and compliance with aviation regulations. The directive applies to all models of the Beechcraft 76 and emphasizes the importance of regular inspections to prevent structural failures. It includes compliance timelines and background information on the directive's necessity due to reported failures in the engine mount channels.

• Visual inspections of engine mount channels are required for all Beechcraft 76 models.
• Inspect channels P/Nos. 105-980000 -19, -21, -23, -25 for cracks.
• Compliance is required within 100 hours of service after April 30, 1984.
• Subsequent inspections must occur at intervals not exceeding 100 hours.
• Defective mount channels must be repaired to an acceptable scheme.