Piper PA-30 Twin Comanche manuals

This document serves as a Supplemental Type Certificate (STC) for the Piper PA-30 and PA-39 aircraft, commonly known as the Twin Comanche. It details the certification of a new propeller system designed to enhance the performance and operational characteristics of these aircraft models. The STC includes specifications for the propellers, installation instructions, and supplementary documentation necessary for compliance with aviation regulations. It is intended for aircraft owners, maintenance personnel, and operators seeking to upgrade their Twin Comanche with new propeller technology. The document outlines the benefits of the new propeller system, including improved performance metrics and operational efficiency.

• The document is a Supplemental Type Certificate for the Piper PA-30 and PA-39 (Twin Comanche).
• The STC includes two 3-blade constant speed propellers and composite spinners.
• Propeller specifications include a maximum diameter of 180 cm (70.9 in) and a weight of 25.9 kg (57.1 lbs).
• Take-off performance is enhanced by approximately 15% under standard conditions.
• Single-engine climb performance is improved by about 10% under maximum takeoff weight.