CESSNA 414 — Service Manual

This document is a service letter from Hartzell Propeller Inc. specifically addressing the installation and maintenance of de-ice boots for Cessna 414A aircraft equipped with Hartzell PHC-C3YF-2UF/FC7663DB-2Q propellers. The letter outlines the compliance requirements for replacing de-ice boots with part numbers 4H1601-14, 4H1601-10, or 7931-4E1601-10, and provides instructions for installation and inspection. It emphasizes the importance of following the referenced manuals for proper procedures and safety. The document is intended for maintenance personnel and operators of Cessna 414A aircraft to ensure the reliability and safety of the de-ice systems under specific STC approvals.

• Affected propellers: Hartzell PHC-C3YF-2UF/FC7663DB-2Q on Cessna 414A.
• De-ice boot part numbers: 4H1601-14, 4H1601-10, 7931-4E1601-10.
• Approximately 2.0 man hours required for de-ice boot replacement.
• Installation of de-ice boots is FAA approved under Hartzell Service Letter HC-SL-30-279.
• Refer to Hartzell manuals for detailed installation and inspection procedures.