Piper PA-42 Cheyenne 400 — Airworthiness Directives

This document outlines the airworthiness directives for the Piper PA-42 Cheyenne 400, specifically focusing on the new propeller specifications and enhancements. It provides detailed information on the advantages of the new propeller system, including improvements in performance metrics such as take-off distance, climb rate, and cruising speeds. The document also lists the contents of the STC kit, including installation instructions and operational manuals, which are essential for maintaining compliance and safety. This information is crucial for pilots and maintenance personnel to ensure the aircraft operates efficiently and safely under the new specifications.

• Take-off distance over a 50 ft obstacle reduced by approx. 5%.
• Enhanced climb performance by approx. 3% under standard conditions.
• Cruising speeds increased by approx. 5 knots at FL250 and 11,500 lbs GW.
• Total weight of new propellers is approx. 52 lbs less than original.
• Propeller maximum diameter is 98.4 inches.