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Dynon Avionics Cessna 172 F-S Installation & Maintenance Manual

Skyview hdx system
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SkyView HDX System
Autopilot Servo Installation &
Maintenance Manual
Contains Instructions for Continued Airworthiness
Cessna Models 172 F-S
103526-000
Revision D
6/23/2020
Copyright © 2019 by Dynon Avionics, Inc.
Dynon Avionics grants third parties' permission to print this document

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Summary of Contents for Dynon Avionics Cessna 172 F-S

  • Page 1 SkyView HDX System Autopilot Servo Installation & Maintenance Manual Contains Instructions for Continued Airworthiness Cessna Models 172 F-S 103526-000 Revision D 6/23/2020 Copyright © 2019 by Dynon Avionics, Inc. Dynon Avionics grants third parties' permission to print this document...
  • Page 2 Contact Information Dynon Avionics, Inc. 19825 141st Place NE Woodinville, WA 98072 Phone: 425-402-0433 Business Operations: 8:00 AM–5:00 PM (Pacific Time) Monday–Friday Technical Support Operations: 7:00 AM–4:00 PM (Pacific Time) Monday–Friday Email Sales: sales@dynoncertified.com Email Support: support@dynoncertified.com Fax: 425-984-1751 Web: www.dynoncertified.com Copyright ©2019 Dynon Avionics, Inc.
  • Page 3 Revision History DATE APPROVED DESCRIPTION OF CHANGE 8/31/2018 ECO 312857 Initial Release 2/15/2019 ECO 317851 Improved organization and illustrations • Re-titled doc to include Maintenance. 10/25/2019 ECO 337637 • Applied new document template, including adding new Section 1: Introduction, to clarify use of document. This content is boilerplate.
  • Page 4 References DOCUMENT TITLE 103272-000 SkyView HDX Aircraft Flight Manual Supplement 102949-003 SkyView HDX Pilot’s User Guide Dynon Document 103272-000 SkyView HDX Aircraft Flight Manual Supplement 103000-000 Dynon Servo Shear Screw Replacement Instructions 43.13-1B Acceptable Methods, Techniques and Practices- Aircraft Inspection and Repair 43.13-2B Acceptable Methods, Techniques and Practices- Aircraft Alterations Cessna Model 172 Maintenance Manual SkyView HDX System Autopilot Servo Installation &...

  • Page 5: Table Of Contents

    Table of Contents Introduction ....................1 Product Registration ..................... 1 Using this Manual ......................1 Manual Conventions ..................... 1 Installation Compliance ....................2 Installation Record ......................2 Materials ....................3 Roll Servo Installation Materials ................... 3 Pitch Servo Installation Materials .................. 4 Roll Servo Mounting Bracketry Installation ...........
  • Page 6 Pitch Servo Installation ....................35 SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | iv...

  • Page 7: Introduction

    Introduction This manual provides instructions to install, configure, and maintain SkyView HDX System autopilot servos in unmodified Cessna 172 Model Series F–S airplanes. Any airplane configurations that require modifications to areas in the airplane where autopilot servos are installed are not addressed in this manual. The SkyView HDX System autopilot servo settings are available for download as a configuration file that is loaded into the SkyView HDX display unit.

  • Page 8: Installation Compliance

    Installation Compliance Airplanes on the AML meet a minimum required configuration for applicability of the STC. However, some airplanes may have been modified, and consequently, it may be difficult to use the information in this manual to completely substantiate the installation in compliance with the STC.

  • Page 9: Materials

    Materials This section provides information about the materials used in installation of Roll and Pitch servos in unmodified Cessna 172 Model Series F–S airplanes. 2.1 Roll Servo Installation Materials The materials identified in Table 1 are required to install the Roll servo. Item numbers are used as figure call-outs in Section 7.1 Roll Servo Parts and Assemblies and Section...

  • Page 10: Pitch Servo Installation Materials

    2.2 Pitch Servo Installation Materials The materials identified in Table 2 are required to install a Pitch servo. Item numbers are used as figure call-outs in Section 7.3 Pitch Servo Parts and Assemblies and Section 7.4 Pitch Servo Installation. Table 2: Pitch Servo Installation Materials ITEM DYNON PART DESCRIPTION...
  • Page 11 ITEM DYNON PART DESCRIPTION 3-11 MS20426AD3-4 RIVET ALUM 100° COUNTERSUNK 503674-000 SERVO CAPSTAN ACCESSORY KIT 1/8" AN365-1032A NUT LOCK STL #10-32 AN960-10-3 WASHER FLAT STL #10 AN3H-6A BOLT HEX #10-32 DRILLED HEAD BRIDLE CABLE 1/16" DIA SWAGE STOP FOR CABLE 1/16" DIA BRIDLE CABLE CLAMP 1/8"...

  • Page 12: Roll Servo Mounting Bracketry Installation

    Roll Servo Mounting Bracketry Installation This section details how to assemble and temporarily install the Roll Servo mounting bracketry. Refer to Section 6 Continued Airworthiness to remove or install a roll servo after bracket installation is complete. Refer to Section 5 Servo Electrical Wiring for roll servo wiring information.
  • Page 13 Complete the following to position and temporarily install Upper and Lower Roll Servo Brackets: Attach upper and lower brackets to roll servo (see Figure 4). Do not fully tighten fasteners yet. Make sure upper bracket is in lowest (retracted) position allowed by its mounting slots.

  • Page 14: Pitch Servo Mounting Bracketry Installation

    Pitch Servo Mounting Bracketry Installation This section details how to assemble and install the Pitch Servo mounting bracketry. Refer to Section 6 Continued Airworthiness to remove or install a Pitch Servo after bracket installation is complete. Refer to Section 5 Servo Electrical Wiring for Pitch Servo wiring information.

  • Page 15: Vertical Bracket Positioning And Temporary Installation

    4.3 Vertical Bracket Positioning and Temporary Installation Complete the following to assemble, position, and temporarily install the Pitch Servo Vertical Bracket Assembly: Temporarily attach pitch servo, idler pulley, and pulley guard to vertical bracket (see Figure 21). Position vertical bracket assembly so that lower flange of vertical bracket rests on base bracket (see Figure 22).

  • Page 16: Sway Brace Final Assembly

    Complete the following to permanently install the Pitch Servo Bracket Assembly in the airplane: Position pitch servo bracket assembly in airplane, and then attach with cleco-style fasteners Position left and right angle braces against base bracket flanges and FS108.00 bulkhead, and then attach with cleco-style fasteners. Use #21 drill to finalize holes in base bracket flanges, angle brace lower flanges, and airplane skin, removing cleco-style fasteners as you proceed.

  • Page 17: Servo Electrical Wiring

    Servo Electrical Wiring This section provides details about the electrical installation of autopilot servos. Dynon Avionics offers a wire harness kit (SV-NET-SERVO) to simplify the process of electrically connecting autopilot servos to the SkyView HDX Network and airplane power. Contact Dynon Sales for more information.

  • Page 18: Electrical Connection

    • Black (pin 2) wire to common airframe ground. • Yellow (pin 3) wire to Autopilot Disconnect (A/P DISC) button on instrument panel or yoke. Secure wires to ensure they do not chafe or interfere with the airplane's flight controls or other moving components. 5.3 Electrical Connection To connect an autopilot servo to the airplane's electrical system: Make sure airplane power is disconnected.

  • Page 19: Continued Airworthiness

    Continued Airworthiness This section provides detailed Continued Airworthiness information for SkyView HDX autopilot servos. 6.1 Roll Servo Removal and Installation This section details how to remove and install a Roll Servo. Before installing a Roll Servo, verify the aileron control cables are rigged and tensioned to the airplane manufacturer’s specifications.
  • Page 20 6.1.3 Roll Servo Installation Complete the following to install the Roll Servo: Before installing a Roll Servo, verify the aileron control cables are rigged and tensioned to the airplane manufacturer’s specifications. Attach upper and lower brackets to roll servo (see Figure 4).
  • Page 21 DO NOT bend cable guard flanges away from capstan. They are intended to keep bridle cable from jumping grooves. 14. Ensure aileron cables are clean and free of dirt and grease before installing cable clamps. 15. Perform one of the following: •...

  • Page 22: Pitch Servo Removal And Installation

    6.2 Pitch Servo Removal and Installation This section details how to remove and install a Pitch Servo. Before installing a Pitch Servo, verify that the elevator control cables are rigged and tensioned to the airplane manufacturer’s specifications. Installers should consider printing the figures in Section and keeping them on- hand as they perform removal and installation.
  • Page 23 Set cable swage into swage hole and pass the other end of the bridle cable under opposite cable guard flange (see Figure 28 Figure 29). Following grooves, feed both cable ends around capstan and underneath next set of cable guard flanges (see Figure 28 Figure 29).

  • Page 24: Servo Calibration Procedure

    6.3 Servo Calibration Procedure Servo calibration cannot be performed without an SV-ADAHRS-200 module installed and configured in the SkyView HDX System and Network. V-speeds must also be correctly entered in the SkyView HDX System. The servo calibration procedure identifies the orientation and range of motion of each servo and must be performed before the servo test procedure.

  • Page 25: Figures

    Figures 7.1 Roll Servo Parts and Assemblies Figure 1: Roll Servo (SV42C) SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 19...
  • Page 26 Figure 2: Roll Servo (SV42C), Exploded View SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 20...
  • Page 27 Figure 3: Roll Servo Bracketry SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 21...
  • Page 28 Figure 4: Roll Servo and Brackets Assembled SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 22...

  • Page 29: Roll Servo Installation

    7.2 Roll Servo Installation Figure 5: Roll Servo Installation Access SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 23...
  • Page 30 Figure 6: Location of Roll Servo/Bracket Assembly SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 24...
  • Page 31 Figure 7: Roll Server Installation, Upper Wing Skin Preparation SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 25...
  • Page 32 Figure 8: Roll Server Installation, Lower Wing Skin Preparation SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 26...
  • Page 33 Figure 9: Roll Servo/Bracket Assembly Installation Steps SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 27...
  • Page 34 Figure 10: Roll Servo/Bracket Assembly Installation, Left View SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 28...
  • Page 35 Figure 11: Roll Servo/Bracket Assembly Final Installation SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 29...
  • Page 36 Figure 12: Roll Servo Capstan and Bridle Cable Orientation Figure 13: Locations of Roll Servo Bridal Cable Clamps SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 30...

  • Page 37: Pitch Servo Parts And Assemblies

    7.3 Pitch Servo Parts and Assemblies Figure 14: Pitch Servo (SV42C) SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 31...
  • Page 38 Figure 15: Pitch Servo (SV42C), Exploded View SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 32...
  • Page 39 Figure 16: Pitch Servo Bracketry SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 33...
  • Page 40 Figure 17: Pitch Servo and Bracketry Assembled SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 34...
  • Page 41 7.4 Pitch Servo Installation Figure 18: Location of Pitch Servo/Bracket Assembly SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 35...
  • Page 42 Figure 19 Location of Pitch Servo Base Bracket and Angle Braces SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 36...
  • Page 43 Figure 20: Pitch Servo Angle Brace Installation SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 37...
  • Page 44 Figure 21: Pitch Servo Vertical Bracket Assembly SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 38...
  • Page 45 Figure 22: Location of Pitch Servo Vertical Bracket Assembly SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 39...
  • Page 46 Figure 23: Pitch Servo Vertical Bracket Assembly Alignment SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 40...
  • Page 47 Figure 24: Pitch Servo Vertical Bracket Attachment SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 41...
  • Page 48 Figure 25: Pitch Servo Base Bracket Final Installation SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 42...
  • Page 49 Figure 26: Pitch Servo Sway Brace Components SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 43...
  • Page 50 Figure 27: Pitch Servo Sway Brace Installation SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 44...
  • Page 51 Figure 28: Pitch Servo Capstan and Bridle Cable Orientation SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 45...
  • Page 52 Figure 29: Pitch Servo Bridal Cable Clamp Locations SkyView HDX System Autopilot Servo Installation & Maintenance Manual - Cessna Models 172 F-S, Revision D Page | 46...

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