Piper PA-24 Comanche — Supplemental Type Certificate

This Service Bulletin HC-SB-61-311 from Hartzell Propeller Inc. addresses the replacement of the 835-54(P) spinner assembly, specifically for aircraft including the Piper PA-24 Comanche. It outlines the compliance requirements for affected spinner assemblies and provides detailed instructions for replacement and inspection. The bulletin highlights the importance of adhering to the latest revisions to ensure safety and compliance with FAA regulations. The document is intended for aircraft owners, maintenance personnel, and operators who utilize the specified spinner assemblies on their aircraft.

• The Hartzell 835-54(P) spinner assembly is affected by this Service Bulletin for the Piper PA-24 Comanche.
• Compliance with the latest revision is critical to avoid unsafe conditions.
• A cracked spinner dome requires immediate replacement before further flight.
• The weight of the 835-54(P) spinner assembly varies from 2.5 to 3.5 pounds (1.13 to 1.59 kg) based on configuration.
• The new 103585( ) spinner assembly is a recommended replacement option.