Piper PA-24 Comanche — Service Bulletins

This document is an Alert Service Bulletin from Hartzell Propeller Inc., specifically addressing issues related to the spinner assemblies used on the Piper PA-24 Comanche and other aircraft. The bulletin outlines critical safety information regarding the 835-54(P) and 835-58(P) spinner assemblies, detailing compliance requirements for affected aircraft. It includes instructions for inspections, replacement parts, and the introduction of new paint options for the spinner assemblies. The bulletin emphasizes the importance of adhering to the latest revisions to ensure safety and compliance with FAA regulations. Pilots and maintenance personnel are advised to follow the outlined procedures to prevent potential safety hazards associated with spinner assembly failures.

• The Hartzell 835-54(P) and 835-58(P) spinner assemblies are affected by this service bulletin.
• Pre-flight inspections are mandatory for the affected spinner assemblies.
• If a crack is found in the spinner assembly, it must be replaced before further flight.
• The 835-54(P) spinner assembly weighs 2.9 pounds (1.32 kg), while the 103585( ) spinner assembly weighs 2.3 pounds (1.04 kg).
• Installation of a 103585( ) spinner assembly is considered terminating action for this Alert Service Bulletin.