HC-SL-30-306 De-ice - SERVICE LETTER
CESSNA 414A · Service Manual
Overview
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.
Document
Source
Originally published by hartzellprop.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Service Manual
- Year ·
- 2011
- Pages ·
- 4
- File size ·
- 208 KB
- Publisher ·
- hartzellprop.com
What is the HC-SL-30-306 De-ice - SERVICE LETTER?
The HC-SL-30-306 De-ice - SERVICE LETTER is a service manual for the CESSNA 414A, dated 2011.
How many pages is the HC-SL-30-306 De-ice - SERVICE LETTER?
The copy of the HC-SL-30-306 De-ice - SERVICE LETTER on file runs 4 pages.
Where does the HC-SL-30-306 De-ice - SERVICE LETTER come from?
This copy of the HC-SL-30-306 De-ice - SERVICE LETTER was originally published by hartzellprop.com and is hosted on Sprinkle as a free, searchable reference copy.
What year was the HC-SL-30-306 De-ice - SERVICE LETTER published?
The HC-SL-30-306 De-ice - SERVICE LETTER — the CESSNA 414A service manual on file — is dated 2011.
Most owners only have the POH. Here's the essential set for the CESSNA 414A.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
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- Technical History for Cessna 414A SN 414A0317Maintenance Manual
- Cessna 414A RAM VII EMERGENCY CHECKLISTFlight Manual
In this document
Planning Information
This section details the effectivity of the service letter, stating that it applies to Hartzell propellers installed on Cessna 414A under Ram STC SA4546SW. It explains the reason for the service letter, which is to address issues with de-ice boot leadwires coming loose, and introduces the installation of new de-ice boots with improved design.
Compliance
The compliance section specifies that if de-ice boot replacement is necessary, it must be done using the specified part numbers. It also notes that different part numbers may be intermixed on a propeller assembly, but emphasizes the need to refer to the Hartzell manuals for inspection criteria.
Accomplishment Instructions
This section provides detailed instructions for the installation of de-ice boots, including references to the Hartzell manuals for harness routing and removal procedures. It highlights that specific part numbers may be used and outlines the requirements for balancing if different manufacturers' boots are intermixed.
Safety notes
- Ensure compliance with Hartzell Propeller Electrical De-ice Boot Removal and Installation Manual 182 for safety and airworthiness.
Full document text
HARTZELL PROPELLER INC. SERVICE LETTER HC-SL-30-306 De-ice: Hartzell De-ice Boots for Cessna 414A Installed Under Ram STC 4546SW HC-SL-30-306 Page 1 of 4 Mar 11/11 1. Planning Information A. Effectivity (1) Hartzell PHC-C3YF-2UF/FC7663DB-2Q propellers installed on Cessna 414A under Ram STC SA4546SW are affected by this Service Letter. B. Reason (1) Hartzell Propeller Inc. has received reports from the field of de-ice boot leadwires coming loose from the blade shank. The leadwires are bonded to the blade shank with adhesive. (a) Refer to Hartzell Propeller Electrical De-ice Boot Removal and Installation Manual 182 (61-12-82) for repair procedures for loose lead wires. (2) This Service Letter introduces installation of de-ice boot P/N 4H1601-14 on the affected installation. The P/N 4H1601-14 de-ice boot has a bent lead strap to cover the leadwires. Refer to Figure 1. (3) The bent lead strap is secured to the blade and prevents the leadwires from coming loose. (4) Hartzell Propeller Inc. has obtained FAA approval for installation of de-ice boots on Hartzell propellers. (5) Regulatory action is not expected. C. Description (1) This Service Letter permits installation of P/N 4H1601-14 de-ice boots and the P/N 4H1601-10 or 7931-4E1601-10 de-ice boots on the same propeller assembly. NOTE: Refer to the approved aircraft installation data to determine installation eligibility. Hartzell Service Letters HC-SL-30-260 and HC-SL-30-279 and Hartzell Application Guide 159 are FAA accepted sources for this information. (2) Propeller assemblies shipped from Hartzell Propeller Inc. will have the P/N 4H1601-14 de-ice boots installed. © 2011 - Hartzell Propeller Inc. - All rights reserved HARTZELL PROPELLER INC. SERVICE LETTER HC-SL-30-306 De-ice: Hartzell De-ice Boots for Cessna 414A Installed Under Ram STC 4546SW Mar 11/11 HC-SL-30-306 Page 2 of 4 D. Compliance (1) If de-ice boot replacement is required, replace the de-ice boot with the P/N 4H1601-14, 4H1601-10, or 7931-4E1601-10 de-ice boot in accordance with the Accomplishment Instructions in this Service Letter. (a) De-ice boots P/N 4H1601-14, 4H1601-10, or 7931-4E1601-10 may be used. Boots that have different part numbers may be intermixed on a propeller assembly. NOTE: Refer to Hartzell Propeller Electrical De-ice Boot Removal and Installation Manual 182 (61-12-82) for de-ice boot inspection criteria. E. Approval (1) Hartzell Propeller Inc. has obtained FAA approval for installation of de-ice boots on Hartzell propellers. Hartzell Service Letter HC-SL-30-279 provides installation approval for Hartzell de-ice boots on Hartzell propellers. F. Manpower (1) Approximately 2.0 man hours are required to remove and install one de-ice boot. G. References (1) Hartzell Application Guide 159 (61-02-59) (2) Hartzell Propeller Ice Protection System Manual 180 (30-61-80) (3) Hartzell Propeller Electrical De-ice Boot Removal and Installation Manual 182 (61-12-82) (4) Hartzell Service Letter HC-SL-30-260 (5) Hartzell Service Letter HC-SL-30-279 H. Other Publications Affected None HARTZELL PROPELLER INC. SERVICE LETTER HC-SL-30-306 De-ice: Hartzell De-ice Boots for Cessna 414A Installed Under Ram STC 4546SW HC-SL-30-306 Page 3 of 4 Mar 11/11 2 1 3 De-ice Boot 4H1601-14 Configuration Figure 1 2. Accomplishment Instructions A. Installation Instructions For A De-Ice Boot (1) Refer to Hartzell Propeller Ice Protection System Manual 180 (30-61-80) for de-ice boot harness routing instructions and applicable parts list. (2) Remove the de-ice boot in accordance with Hartzell Propeller Electrical De-ice Boot Removal and Installation Manual 182 (61-12-82). (3) Install the de-ice boot in accordance with Hartzell Propeller Electrical De-ice Boot Removal and Installation Manual 182 (61-12-82). HARTZELL PROPELLER INC. SERVICE LETTER HC-SL-30-306 De-ice: Hartzell De-ice Boots for Cessna 414A Installed Under Ram STC 4546SW Mar 11/11 HC-SL-30-306 Page 4 of 4 (4) De-ice boots P/N 4H1601-14, 4H1601-10, and 7931-4E1601-10 may be used. (a) Boots with different part numbers may be intermixed on a propeller assembly. (b) If boots from different manufacturers or different dash numbers are intermixed on a propeller assembly, static and/or dynamic balancing of the assembly may be required. (c) Compliance with Hartzell Propeller Electrical De-ice Boot Removal and Installation Manual 182 (61-12-82) is required when a P/N 4H1601-10 or a 7931-4E1601-10 de-ice boot is installed. B. Instructions For De-Ice Boot Inspection (1) Hartzell Propeller Electrical De-ice Boot Removal and Installation Manual 182 (61-12-82) provides instructions for continued airworthiness for de-ice boot. NOTE: Hartzell de-ice manuals are available on the Hartzell website, www.hartzellprop.com.