Mooney M20J 201 — Weight And Balance

This document provides installation instructions for Mooney 201 (M20J) spinners on earlier model Mooneys, along with weight and balance information. It is intended for aircraft maintenance personnel and owners who are modifying their Mooney aircraft with new spinner assemblies. The document outlines the necessary steps for installation, including weight and balance adjustments that must be made to ensure safe operation of the aircraft after modifications. It includes specific part numbers and torque specifications for the installation process, as well as details on how to document the modifications in the aircraft's logbook.

• Weight change is 2.0 pounds at -32 inches moment arm, totaling -64 inch-pounds.
• For M20F and M20G models, adjust moment arm to -37 inches for a total moment of -74 inch-pounds.
• Propeller nuts should be torqued to 60-70 ft-lbs for Hartzell and 55-65 ft-lbs for McCauley propellers.
• Installation requires removal of the existing spinner and propeller.
• Logbook entry and Form 337 must be completed post-installation.