Dynon Avionics SkyView HDX Installation & Maintenance Manual
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Dynon Avionics SkyView HDX Installation & Maintenance Manual

Autopilot servo in the piper pa-34 seneca series pa-34-200t seneca ii pa-34-220t seneca iii pa-34-220t seneca iv pa-34-220t seneca v
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SkyView
Autopilot Servo Installation & Maintenance Manual
Piper PA-34 Seneca Series
PA-34-200T Seneca II
PA-34-220T Seneca III
PA-34-220T Seneca IV
PA-34-220T Seneca V
Except for serial numbers 34-7570001 through 34-8170092,
when equipped with pneumatic de-ice boots.
103741-000
Rev A
8/6/2020
Copyright © 2020 by Dynon Avionics, Inc.
Dynon grants third parties' permission to print this document

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Summary of Contents for Dynon Avionics SkyView HDX

  • Page 1 SkyView Autopilot Servo Installation & Maintenance Manual Piper PA-34 Seneca Series PA-34-200T Seneca II PA-34-220T Seneca III PA-34-220T Seneca IV PA-34-220T Seneca V Except for serial numbers 34-7570001 through 34-8170092, when equipped with pneumatic de-ice boots. 103741-000 Rev A 8/6/2020 Copyright ©...
  • 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: 7:30 AM - 4:00 PM (Pacific Time) Monday - Friday Email Sales: sales@dynoncertified.com Email Support: support@dynoncertified.com...
  • Page 3 Revision History DATE APPROVED DESCRIPTION OF CHANGE 8/6/2020 ECO 330214 Initial Document Release HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | i...

  • Page 4: Table Of Contents

    Table of Contents Introduction ....................4 Product Delivery and Warranty ..................4 Product Registration ..................... 4 Using this Manual ......................4 Manual Iconography ..................... 5 Referenced Documents ....................5 Mechanical Drawings ....................5 Installation Record ......................5 Installation Compliance ................6 Pre-installation Information ...................
  • Page 5 Servo Capstan and Cable Guard Installation.............. 57 HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | iii...

  • Page 6: Introduction

    This document provides instructions for installing and maintaining the SkyView HDX Autopilot servos in the Piper PA-34 Seneca series of airplanes. Autopilot servo installation in any airplane with modifications to areas where the servos will be installed is not addressed in this document. See Section...

  • Page 7: Manual Iconography

    The following Dynon Avionics documents are referenced in this manual: • 103261-000 SkyView HDX System Installation Manual • 103947-000 SkyView HDX Wiring Diagram - Twin Engine • 103777-000 SkyView HDX System Equipment Installation Record • 103000-000 Dynon Servo Shear Screw Replacement Kit Instructions 1.6 Mechanical Drawings...

  • 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: Control Cable Verification

    Control Cable Verification The SkyView HDX Autopilot system for the Piper PA-34 Seneca series of airplanes is designed to attach to the airplane's original 1/8" diameter control cables. It is important for installers to verify the diameter of the control cables before starting installation activities. The diameter of...

  • Page 10: Materials

    Materials The materials identified in Table 1 are required to install the roll servo into a Piper PA-34 series airplane. ITEM numbers refer to call-out numbers in the figures in Section 8.2: Roll Servo Parts, Assemblies, and Installation. Table 1: Roll Servo Installation Materials ITEM DYNON P/N DESCRIPTION...
  • Page 11 The materials identified in Table 2 are required to install the pitch servo into a Piper PA-34 series aircraft. ITEM numbers refer to call-out numbers in the figures in Section 8.3: Pitch Servo Parts, Assemblies, and Installation. Table 2: Pitch Servo Installation Materials ITEM DYNON P/N DESCRIPTION...

  • Page 12: Servo Bracketry Installation And Bridle Cable Preparation

    Servo Bracketry Installation and Bridle Cable Preparation This section provides instructions for installing the roll and pitch servo bracketry, and then fabricating the bridle cable assemblies that attach to the aileron and elevator control cables. The instructions apply to all Seneca model airplanes except for serial numbers 34-7570001 through 34-8170092, when equipped with pneumatic de-ice boots.
  • Page 13 5.1.2.1 Mount and Base Bracket Installation (With Factory-installed Autopilot) Complete the following steps to temporarily install the roll servo mount bracket and base bracket in an airplane equipped with a factory autopilot roll servo that is installed in the same general position.
  • Page 14 5.1.2.2 Mount and Base Bracket Installation (Without Factory-installed Autopilot) Complete the following steps to temporarily install the roll servo mount bracket and base bracket in an airplane not equipped with a factory autopilot pitch servo. To temporarily install the mount and base brackets: 1.
  • Page 15 5.1.2.3 Brace Installation (All Airplanes) Using Figure 9 as reference, complete the following steps to temporarily install the roll servo brace. To temporarily install the roll servo brace: 1. Place brace into position, and then secure brace to mount bracket. 2.

  • Page 16: Roll Servo Bridle Cable Preparation

    5.2 Roll Servo Bridle Cable Preparation This section provides instructions for preparing the roll servo bridle cable assembly for final installation. Performing these tasks after installing the roll servo bracketry, and before permanently installing the roll servo, simplifies the overall installation. The instructions in this section assume the roll servo is still temporarily installed in airplane per procedures in Section 5.1.
  • Page 17 5.2.3 Temporary Bridle Cable Connection to Aileron Cable Reference Figure 11 Figure 12 when performing the following procedure. To temporarily connect bridle cable ends to the airplane's aileron crossover cable: 1. Secure ailerons in neutral position. 2. Connect inboard and outboard cable ends to airplane's aileron crossover cable. Loosely secure to permit cable slippage.

  • Page 18: Pitch Servo Bracketry Installation

    5.3 Pitch Servo Bracketry Installation The pitch servo mount bracket, base bracket, and gusset mount directly to the airplane (see Figure 23 for complete installation example). The mount bracket positions the base bracket and becomes fastened to the base bracket. The pitch servo gusset is fastened to base bracket and the airplane's existing structure.
  • Page 19 6. Temporarily secure mount bracket to crossover cable guide assembly so that: • Servo capstan is centered above right-side outboard elevator control cable, as shown Figure • Servo capstan is aligned with right outboard elevator control cable so that the bridle cables will feed onto grooves in the capstan.
  • Page 20 5.3.2.2 Mount and Base Bracket Installation (Without Factory-installed Autopilot) Complete the following steps to install the pitch servo mount bracket and base bracket in an airplane not equipped with a factory autopilot pitch servo. To temporarily install the mount and base brackets: 1.
  • Page 21 5.3.2.3 Gusset Installation (All Airplanes) Using Figure 19 as reference, complete the following steps to temporarily install the pitch servo gusset. To temporarily install the gusset: 1. Remove temporary fasteners from 3-4 aft holes on base bracket horizontal flange. 2. If there is an existing hole and fastener in pulley mounting bracket at FS 128, then remove fastener.
  • Page 22 5.3.3 Permanent Pitch Servo Bracketry Installation This section provides instructions for permanently installing the mount bracket, base bracket, and gusset. To complete pitch servo bracketry installation: 1. Disassemble and remove all temporarily secured bracketry. 2. Deburr all holes in bracketry and fuselage skin/structure. 3.

  • Page 23: Pitch Servo Bridle Cable Preparation

    5.4 Pitch Servo Bridle Cable Preparation This section provides instructions for preparing the roll servo bridle cable assembly for final installation. Performing these tasks after installing the roll servo bracketry, and before permanently installing the roll servo, simplifies the overall installation. The instructions in this section assume the pitch servo is still temporarily installed in airplane per procedures in Section 5.3.
  • Page 24 5.4.3 Temporary Bridle Cable Connection to Elevator Cable Reference Figure 21 when performing the following procedure. To temporarily connect bridle cable ends to the airplane's elevator cable: 1. Secure elevator in neutral position. 2. Connect inboard and outboard cable ends to airplane's elevator "up" cable. Loosely secure to permit cable slippage.

  • Page 25: Servo Electrical Wiring

    Servo Electrical Wiring For complete wiring and network configuration instructions, refer to the following: • 103261-000 SkyView HDX System General Installation Manual document • 103947-000 SkyView HDX Wiring Diagram - Twin Engine Route the servo electrical harnesses through the airframe structure as appropriate. Take precautions to prevent the servo harnesses from chafing against structure or interfering with the airplane's flight controls or other moving components.

  • Page 26: Servo Maintenance

    Servo Maintenance This section provides information and procedures to maintain the roll and pitch servos. It serves as instructions for Continued Airworthiness. 7.1 Roll Servo Removal and Installation 7.1.1 Location and Access The roll servo is located beneath the cabin floor between the main spar and the rear spar carry- through structures on the left-hand side of the cabin as indicated in Figure Access requires removing the seats, carpeting, and the floor in accordance with the...
  • Page 27 5. Safety wire bolts to prevent them from loosening. Installers can safety wire bolts together (see Figure 13), to the mount bracket using provided holes in bracket, or a combination thereof, depending on preferred method and access. 6. Connect D9 electrical harness connector to roll servo. Use a clamp or other fastener to secure harness cable to avoid entanglement with moving components.
  • Page 28 8. Secure capstan/cable assembly onto servo shaft. (See Section 7.5: Servo Capstan Removal and Re-installation for instructions.) 9. Make sure control cable where bridle cable clamps will attach is clean and free of dirt and grease. 10. Connect inboard and outboard cable ends to airplane's aileron crossover cable (see Figure 11).
  • Page 29 To check the bridle cable installation: 1. Remove tape temporarily securing bridle cable to capstan. 2. Remove device securing flight controls in neutral position. 3. While moving control through full range of motion, verify the following: • Cable clamps do not contact any structures during entire travel. •...

  • Page 30: Pitch Servo Removal And Installation

    7.2 Pitch Servo Removal and Installation 7.2.1 Location and Access The pitch servo is located beneath the cabin floor between the main spar and the rear spar carry through structure on the right-hand side of the cabin as shown in Figure Access requires removing the seats, carpeting, and the floor in accordance with the manufacturers service instructions.
  • Page 31 7.2.4 Pitch Servo Bridle Cable Installation Make sure all flight control cables are rigged and tensioned in accordance with the manufacturer’s servicing manual. Failure to do so may result in poor Autopilot system performance. To install pitch servo bridle cable: 1.
  • Page 32 • Cable clamps are located at the dimensions shown in Figure • Cable clamps are positioned to best avoid contacting any structures. 12. Tighten aft cable clamp fasteners. 13. Push or pull forward cable clamps outboard, applying 12-15 lbs. of tension to bridle cable. 14.

  • Page 33: Servo Calibration Procedure

    CALIBRATION > AP SERVO CALIBRATION > CALIBRATION) and follow the onscreen instructions to calibrate the servo(s). SkyView HDX checks the status of the AP Disengage Button. If SkyView HDX detects that the button is pressed (the input is grounded) upon entering AP SERVO CALIBRATION, the AP...

  • Page 34: Servo Test Procedure

    You may run this procedure on its own at any time after a successful servo calibration. SkyView HDX will not display AP status on the Top Bar until after this test procedure is successfully completed.

  • Page 35: Cable Guard Adjustment

    10. Install new cotter pin to secure castle nut to servo shaft. 7.6 Cable Guard Adjustment Servos come equipped with a cable guard installed. The cable guard may need to be repositioned to avoid interference with the flight control cables or the bridle cables during servo installation procedures.

  • Page 36: Figures

    Figures 8.1 Servo Locations and Access Figure 1: Pitch and Roll Servo Locations HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 34...

  • Page 37: Roll Servo Parts, Assemblies, And Installation

    8.2 Roll Servo Parts, Assemblies, and Installation Figure 2: Roll Servo Bracketry HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 35...
  • Page 38 Figure 3: Roll Servo Install Preparation HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 36...
  • Page 39 Figure 4: Roll Servo Mount Bracket Assembly HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 37...
  • Page 40 Figure 5: Roll Servo Base and Mount Assembly HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 38...
  • Page 41 Figure 6: Roll Servo Base and Mount Bracket Assembly Alignment HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 39...
  • Page 42 Figure 7: Roll Servo Base and Mount Bracket Fastener Attachment Considerations HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 40...
  • Page 43 Figure 8: Roll Servo Base Bracket Installation HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 41...
  • Page 44 Figure 9: Roll Servo Brace Installation HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 42...
  • Page 45 Figure 10: Roll Servo Bracketry Installed HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 43...
  • Page 46 Figure 11: Roll Servo Bridle Clamp Installation HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 44...
  • Page 47 Figure 12: Roll Servo Bridle Cable Installation HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 45...
  • Page 48 Figure 13: Roll Servo Complete Installation HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 46...

  • Page 49: Pitch Servo Parts, Assemblies, And Installation

    8.3 Pitch Servo Parts, Assemblies, and Installation Figure 14: Pitch Servo Bracketry HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 47...
  • Page 50 Figure 15: Pitch Servo Installation Preparation HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 48...
  • Page 51 Figure 16: Pitch Servo Mount Bracket Assembly HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 49...
  • Page 52 Figure 17: Pitch Servo Base Bracket Installation HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 50...
  • Page 53 Figure 18: Pitch Servo Mount Bracket Assembly Installation HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 51...
  • Page 54 Figure 19: Pitch Servo Gusset Installation HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 52...
  • Page 55 Figure 20: Pitch Servo Bracketry Installed HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 53...
  • Page 56 Figure 21: Pitch Servo Bridle Clamp Installation HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 54...
  • Page 57 Figure 22: Pitch Servo Bridle Cable Installation HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 55...
  • Page 58 Figure 23: Pitch Servo Complete Installation HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 56...
  • Page 59 8.4 Servo Capstan and Cable Guard Installation Figure 24: Servo Capstan and Guard – Exploded View (Roll Shown, Pitch Similar) HDX Autopilot Servo Installation & Maintenance Manual - Piper PA-34 Seneca Series, Rev A Page | 57...

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