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Garmin GFC 600 Manual

Garmin GFC 600 Manual

Automatic flight control system
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GFC 600
Automatic Flight Control System
Part 23 AML STC Maintenance Manual
Includes Instructions for Continued Airworthiness
for STC SA01844WI
190-01938-00
2017 - 2023
Revision 13
Table of Contents
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Summary of Contents for Garmin GFC 600

  • Page 1 GFC 600 Automatic Flight Control System Part 23 AML STC Maintenance Manual Includes Instructions for Continued Airworthiness for STC SA01844WI 190-01938-00 2017 - 2023 Revision 13...
  • Page 2 Garmin. Garmin hereby grants permission to download a single copy of this manual and of any revision to this manual onto a hard drive or other electronic storage medium to be viewed and...
  • Page 3 All information depicted in screen shots, including software file names, versions and part numbers, is subject to change and may not be up to date. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page ii 190-01938-00...

  • Page 4: Table Of Contents

    GSM 86 Clutch Disengagement Check ................. 20 Yaw Trim AP DISC/TRIM INT Switch Check ..............22 5. TROUBLESHOOTING ......................23 GMC 605 Configuration Mode Test Faults ..............23 GFC 600 AFCS Part 23 AML STC Maintenance Manual Page iii 190-01938-00 Revision 13...
  • Page 5 Configuration Module Removal & Replacement ............36 GSA 80/81 Servos ......................37 GSM 86 Servo Gear Box ....................39 7. GARMIN GFC 600 LRU REPLACEMENT/CONFIGURATION & TESTING ....... 40 GMC 605........................40 GSA 87 Servo ........................ 40 GI 285 AFCS Mode Annunciator ................... 41 GTA 82 Trim Adapter .....................
  • Page 6 Table 4-3 – Lightning Strike Inspection Procedure ..............18 Table 5-1 – Configuration Mode Test Faults ................23 Table 5-2 – Normal Mode Failures ..................... 25 Table 6-1 – Configuration Module Kit ..................36 GFC 600 AFCS Part 23 AML STC Maintenance Manual Page v 190-01938-00 Revision 13...

  • Page 7: Introduction

    14 CFR Part 23.1529 and 14 CFR Part 23 Appendix G. 1.2 Applicability This document applies to all Part 23 aircraft equipped with the GFC 600 installed under AML STC SA01844WI. Modification of an aircraft by this Supplemental Type Certificate (STC) obligates the aircraft operator to include the maintenance information provided by this document in the operator’s...

  • Page 8: Definitions/Abbreviations

    USB: Universal Serial Bus WAAS: Wide Area Augmentation System Except where specifically noted, references made to yaw trim apply equally to yaw trim or rudder trim. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 2 190-01938-00 Revision 13...

  • Page 9: Reference Publications

    The documents listed in Table 1-1 are required by this maintenance manual to perform maintenance on the GFC 600 AFCS. It is the responsibility of the owner/operator to ensure that the latest versions of these documents are used during operation, servicing or maintenance of the airplane.

  • Page 10: Revision And Distribution

    Standard Guide for Aircraft Electrical Load and Power Source Capacity Analysis 1.6 Revision and Distribution This document is required for maintaining the continued airworthiness of the GFC 600 AFCS. When this document is revised, every page will be revised to indicate current revision level.

  • Page 11: System Description

    The GMC 605 provides the AFCS commands directly to the GSA 87 and/or GSA 80/81 servos and to the GTA 82 trim adapter(s) (when installed). Refer to the GFC 600 Pilot’s Guide, 190- 01488-00 for operational characteristics of the system.

  • Page 12: Figure 2-2 - Gi 285

    If the analog audio is interfaced to an audio panel other than a GMA 35 or GMA 350, which has a fail-safe audio path, the installation must also include a sonalert. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 6 190-01938-00...

  • Page 13: Gfc 600 Interfaces

    2.1.7 GTA 82 Trim Adapter The Garmin GTA 82 Trim Adapter is a remote mounted device that is used to allow the GFC 600 to drive a trim actuator provided by the airframe manufacturer. In these cases, the GTA 82 provides the required interface.

  • Page 14: Electrical Bonding

    Additional guidance can be found in AC 43.13-1B and SAE ARP 1870. Typical electrical bonding preparation examples are shown in Figure 2-3, Figure 2-4, and Figure 2-5. Figure 2-3 – Electrical Bonding Preparation – Nut Plate GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 8 190-01938-00...

  • Page 15: Figure 2-4 - Electrical Bonding Preparation - Bolt/Nut Joint

    Figure 2-4 – Electrical Bonding Preparation – Bolt/Nut Joint Figure 2-5 – Electrical Bonding Preparation – Terminal Lug GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 9 190-01938-00 Revision 13...
  • Page 16 Additional guidance can be found in AC 43.13-1B and SAE ARP 1870. For a more detailed procedure, refer to SAE ARP 1870 Sections 5.1 and 5.5. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 10 190-01938-00...

  • Page 17: Control And Operation

    3.3 Pitch Trim Switch If the GFC 600 AFCS includes a pitch trim servo, a TRIM switch is provided on the pilot’s flight controls to allow for manual electric control of the pitch trim system. Both halves of the TRIM switch must be pushed simultaneously for the pitch trim servo to engage and run in the requested direction.

  • Page 18: Low Bank Switch

    In certain airframes, the GFC 600 is interfaced to an existing Yaw Trim system. In this case, the existing Yaw Trim switch is retained to command manual electric Yaw Trim. In other airframes, the GFC 600 may include a yaw trim servo. In this case, a Yaw Trim switch is provided to command manual electric Yaw Trim.

  • Page 20: Servicing Information

    4.2 Servicing Information Servicing of the GFC 600 AFCS equipment is ‘on condition’. In the event of system failure, troubleshoot the GFC 600 AFCS in accordance with Section 5. 4.2.1 On Condition Servicing ‘On Condition’ replacement and/or servicing should occur when an item exhibits conditions, symptoms, and/or abnormalities defined in Section 5 of this manual.
  • Page 21 4.2.2 Required Tools The following tools are needed to perform maintenance tasks on GFC 600 AFCS equipment: • Calibrated Milliohm meter with Kelvin probes, OR o Calibrated Ammeter capable of measuring 1.5 Amps of current with a minimum resolution of 0.1A.

  • Page 22: Maintenance Intervals

    DISC/TRIM INT Switch annual inspection, disengages when the AP DISC/TRIM INT Check * whichever is first Switch is pressed * Denotes Airworthiness Limitation Maintenance Requirement (See Section 4.1) GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 16 190-01938-00 Revision 13...

  • Page 23: Visual Inspection

    Cables are routed properly and have sufficient clearance from surrounding structure Control System or other systems Pulleys, fairleads, and cables are intact and not worn beyond the limits in the applicable Aircraft Maintenance Manual GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 17 190-01938-00 Revision 13...

  • Page 24: Electrical Bonding Test

    Verify the resistance is less than or equal to 2.5mΩ. 4.5 Electrical Bonding Test The following bonding tests are provided for aircraft that have a GFC 600 AFCS installed as a requirement beyond any that may be given in the aircraft maintenance manual.

  • Page 25: Sonalert Functional Test

    4-1. 1. Apply external electrical power to the aircraft and avionics systems. 2. Ensure that the GFC 600 AFCS passes PFT. 3. Engage the autopilot by pressing the AP button on the GMC 605. 4. Disengage the autopilot by pressing the AP DISC/TRIM INT switch on the pilot’s flight controls.

  • Page 26: Gsm 86 Slip Clutch Torque Check

    GSM 86 Slip Clutch Torque Check Perform the test per Section 4.7.1 (preferred) or 4.7.2. To perform the procedure, all GFC 600 system equipment must be installed and operational. 4.7.1 Automatic Slip Clutch Torque Check The GSM 86 servo gear box does not have an adjustable slip clutch; however, the torque value can be measured using this procedure.
  • Page 27 GSM 86 Clutch Disengagement Check 1. Apply power to the aircraft avionics bus. 2. Allow the GFC 600 to complete its pre-flight test (PFT). 3. Engage the AP and YD by pressing the AP button on the GMC 605. 4. Ensure that the pitch, roll, and yaw servos are engaged by attempting to move the flight controls.

  • Page 28: Yaw Trim Ap Disc/Trim Int Switch Check

    12. Remove power from the aircraft. Yaw Trim AP DISC/TRIM INT Switch Check If the GFC 600 is interfaced to a GSA 87 for Yaw Trim, complete the following: 1. Verify that the autopilot is powered and has successfully completed its pre-flight test (PFT).

  • Page 29: Troubleshooting

    AFCS, refer to the interconnect diagrams retained with the aircraft permanent records. Before troubleshooting the GFC 600 AFCS, ensure that system configuration settings match those recorded in the completed GFC 600 AFCS Configuration Log that is retained in the aircraft permanent records.
  • Page 30 SAVED air data module. TEST FAILED: CRC Data communications Check configuration FAILED failure or incorrect data module or Air Data content Module wiring. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 24 190-01938-00 Revision 13...

  • Page 31: Gmc 605 Normal Mode Failure Annunciations

    5.2 GMC 605 Normal Mode Failure Annunciations During normal operation of the GFC 600 AFCS, the GMC 605 may annunciate a failure. Consult Table 5-2 below for assistance in troubleshooting. Table 5-2 – Normal Mode Failures Annunciated Possible Cause Troubleshooting Approach...
  • Page 32 Verify wiring between GMC 605 and GSA 87’s GMC 605. and GI 285 (if installed). Reload software (refer to Section 8.1) GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 26 190-01938-00 Revision 13...

  • Page 33: Gmc 605 Troubleshooting

    • Verify wiring of AP DISC/TRIM INT wiring from circuit breaker through AP Servo will not engage (no control DISC/TRIM INT switch to the servo resistance felt) • Verify cable tensions. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 27 190-01938-00 Revision 13...

  • Page 34: Gi 285 Troubleshooting

    • Verify cable tensions. 5.8 Backshell/Backplate Connectors The following figures depict the unit connectors, with views as described. Figure 5-1 – GMC 605 Backplate, viewed from rear of rack GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 28 190-01938-00 Revision 13...

  • Page 35: Figure 5-2 - Gmc 605 Connector View From Wire Entry (P6051 And P6052)

    GTA 82 Connector View (P821) Figure 5-4 – GI 285 Connector from Unit Side (P2851) Figure 5-5 – GSA 80/81 Connector view looking at connector (J801) GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 29 190-01938-00 Revision 13...

  • Page 36: Equipment Removal & Installation

    6.1 GMC 605 Removal: 1. De-energize the GFC 600 system by pulling the AUTOPILOT circuit breaker. 2. Insert a 3/32” hex drive tool into the access hole at the bottom of the face of the unit. 3. Turn the hex drive tool counterclockwise until the tool stops.

  • Page 37: Figure 6-1 - Gmc 605 Installation And Rack/Backplate Assembly

    6.2 GI 285 Removal: 1. De-energize the GFC 600 system by pulling the AUTOPILOT Circuit breaker. 2. Insert a 3/32” hex drive tool into the access hole at the bottom of the face of the unit. 3. Turn the hex drive tool counterclockwise until the hex drive tool stops.

  • Page 38: Gsa 87 Servos

    Trim, 4P871 for Yaw, or 5P871 for Yaw Trim, as applicable) to the mating connector on the servo. 4. Perform a functional check of the GSA 87 per Section 7.2 GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 32 190-01938-00...
  • Page 39 6.3.1 Servo Cable Clamps GFC 600 autopilot installations that use servo cable clamps must be installed on a corresponding cable of appropriate size. This section contains instructions for identifying servo cable clamps and how to confirm a proper fit on aircraft cables after installation.

  • Page 40: Gta 82 Trim Adapter

    Refer to the Master Drawing List 005-01009-01. 3. Reconnect the electrical connector P821 to the mating connector on the GTA 82. 4. Perform a functional check of the GTA 82 per Section 7.4. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 34 190-01938-00...

  • Page 41: Air Data Module (Adm)

    6.5 Air Data Module (ADM) Removal: 1. Verify that the GFC 600 is de-energized by pulling the AUTOPILOT circuit breaker. 2. Remove the GMC 605 per Section 6.1. 3. Disconnect the pitot and static hoses from the ADM (not required when the ADM is used as a cabin pressure sensor).

  • Page 42: Configuration Module Removal & Replacement

    Pins, #22 AWG (HD) 336-00021-00 Removal: 1. De-energize the GFC 600 system by pulling the AUTOPILOT circuit breaker. 2. Remove the GMC 605 per Section 6.1. 3. Loosen the four screws holding the backplate assembly to the rack. 4. Slide the backplate assembly up to disengage the key hole slots in the rack.

  • Page 43: Gsa 80/81 Servos

    3. Use a socket or open-ended wrench to loosen and remove the servo attachment bolts. 4. Carefully remove the servo and place a protective cover on the output gear. 5. Place a protective cover over the GSM 86 servo gear box. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 37 190-01938-00...

  • Page 44: Figure 6-5 - Servo Output Gear

    5. Inspect the harness connectors and check that no pins are bent or otherwise damaged. Connect the harness and secure it appropriately. 6. If no further maintenance is required, continue to Section 7.7. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 38 190-01938-00...

  • Page 45: Gsm 86 Servo Gear Box

    3. Connect the servo cables as shown on the appropriate model-specific installation manual addendum. Refer to the Master Drawing List 005-01009-01. 4. If no other maintenance is to be performed, reinstall the servo(s) per Section 6.7. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 39 190-01938-00...

  • Page 46: Garmin Gfc 600 Lru Replacement/Configuration & Testing

    7. Garmin GFC 600 LRU Replacement/Configuration & Testing This section provides procedures to be followed after a piece of GFC 600 equipment is replaced. At the beginning of each LRU section, instructions are given to guide the technician for various removal/replacement scenarios. These instructions define necessary procedures to be followed for situations where original equipment was reinstalled as well as for situations where new equipment (new serial number) is installed.

  • Page 47: Gi 285 Afcs Mode Annunciator

    Perform a pitot/static leak check in accordance with Section 9.1 . Continue to Sections 9.2, 9.3, and 9.4.2 for return to service tests. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 41 190-01938-00...

  • Page 48: Gsa 80/81 Servo

    Section 9.3 and 9.4.1.1 for Roll Servo Section 9.3 and 9.4.1.2 for Pitch Servo Section 9.3 and 9.4.1.3 for Pitch Trim Servo Section 9.3 and 9.4.1.4 for Yaw Damper Servo. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 42 190-01938-00 Revision 13...

  • Page 49: Gfc 600 Software Load And Configuration Procedures

    16. Press HDG to continue from the splash screen. 17. Verify that the unit passes PFT and does not display a MANIFEST message on the screen. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 43 190-01938-00 Revision 13...

  • Page 50: Gi 285 Software

    8.2 GI 285 Software The GI 285 comes preloaded with the correct software and is not field loadable. No load procedure is required. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 44 190-01938-00 Revision 13...

  • Page 51: Gfc 600 System Configuration

    8.3 GFC 600 System Configuration Configure the GFC 600 AFCS to the original configuration settings which are retained with the aircraft permanent records. Additionally, it is required that all interfaced units be configured to the original configuration settings which are retained with the aircraft permanent records.
  • Page 52 Select G502A if the system is interfaced to an ARC G502A or Sigmatek 4000D or 4000H series directional gyro. Refer to the manufacturer’s data to determine equivalency for specific dash numbers. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 46 190-01938-00 Revision 13...
  • Page 53 Select NO if not interfaced to a system capable of EDO VNAV. EDO VNAV requires GMC 605 version 2.20 or later and interface to a Garmin GDU 620/7XX/1060 or Garmin G5. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 47 190-01938-00 Revision 13...
  • Page 54 GTA 82 trim adapter. Otherwise, select NO. Refer to the Equipment List (005-01009-05) to determine if roll trim is available for the airframe. Select YES. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 48 190-01938-00 Revision 13...
  • Page 55 LIGHTBUS > KEYS > 1/2 and 2/2 pages. See below for representative images. 4. Move the cursor through each of the fields and make the appropriate selections: (KEYS pages are similar to the above) GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 49 190-01938-00...
  • Page 56 8. Move the cursor through each of the following configuration items and make the appropriate selections. Configuration Item Setting Notes OFFSET -50 - 50 Manually configures the default contrast offset value from -50 to 50. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 50 190-01938-00 Revision 13...
  • Page 57 “I” and output “O” values are not displayed. Log File Downloads In certain instances, the data logs and fault logs from the GFC 600 may be requested in order to effectively troubleshoot the system. The instructions in the following subsections are provided to gather these logs.

  • Page 58: Gfc 600 Return To Service Procedure

    6. The unit will restart in normal mode. 9. GFC 600 Return to Service Procedure The following sections will verify the proper operation of the GFC 600 AFCS after maintenance has been performed on the system. Operational information regarding the GFC 600 AFCS can be found in the GFC 600 Pilot’s Guide, p/n 190-01488-00.
  • Page 59 The VS button is also used to accept the desired selections. NOTE: To exit configuration mode, cycle power to the GFC 600 system. 1. Start the GMC 605 in configuration mode by pressing and holding the FD button while applying power to the system.
  • Page 60 NOTE: Select QUIT to quit the engine run-up test if necessary. NOTE: If a TEST COMPLETE: FAILURE message is displayed, refer to Section 5.1 for troubleshooting tips. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 54 190-01938-00 Revision 13...

  • Page 61: Pre-Flight Test (Pft)

    9.3 Pre-Flight Test (PFT) Pre-Flight Test (PFT) is accomplished automatically by the GFC 600 AFCS after the system is powered up in normal mode and after the splash screen is acknowledged. 1. Apply electrical power to the aircraft. 2. After the GMC 605 displays the splash screen, push the HDG button to continue to normal mode operation.

  • Page 62: Normal Mode Tests

    AP button on the GMC 605 or the AP DISC/TRIM INT switch on the pilot’s flight controls. 3. GFC 600 AFCS mode and status annunciations are displayed on the PFD only if the PFD is a Garmin GDU.
  • Page 63 11. Apply continuous aft pressure to the flight controls in a nose up direction. 12. Ensure that the pitch trim (if installed) begins running in the nose down direction. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 57...
  • Page 64 1. Verify that the steps in Section 9.4.1 have been completed. 2. Engage the Yaw Damper by pressing the YD button on the GMC 605. 3. Verify that resistance is felt in the rudder pedals. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 58 190-01938-00...
  • Page 65 11. Verify that the elapsed time for full travel of the yaw trim is within the tolerances specified in the appropriate model-specific installation manual addendum (190-01937-XX). GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 59 190-01938-00...
  • Page 66 20. Actuate the right half of the PITCH TRIM switch in the nose up (aft) direction. 21. Verify that the Autopilot disengages. 22. Engage the Autopilot by pressing the AP button on the GMC 605. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 60 190-01938-00...
  • Page 67 9.4.2.1.1 Yaw Trim Switch Checks If the GFC 600 installation includes yaw trim, complete the following: 1. Verify that the autopilot is powered and is NOT engaged. 2. Actuate the pilot’s yaw TRIM switch in the nose right direction.
  • Page 68 14. Disengage the autopilot by pressing the AP DISC/TRIM INT switch on the pilot’s flight controls. 15. If the GFC 600 installation was interfaced to an existing electric yaw trim system, remove power from the autopilot by pulling the AUTOPILOT circuit breaker and complete checking procedures provided for the exiting yaw trim system as specified by its OEM or aircraft maintenance manual.
  • Page 69 9.4.2.1.2 Roll Trim Switch Check If the GFC 600 installation is interfaced to an existing electric roll trim system using the AIL TRIM DISC pin of the GMC 605 (P6051 pin 16), complete the following: 1. Verify that the autopilot is powered.
  • Page 70 9.4.2.3 Interface Checks NOTE: For systems that are interfaced to a Garmin GDU, ALTS and the selected altitude (in FT) will be displayed on the GMC, and ALTS will be displayed in white on the PFD. These annunciations are separately tested in Section 9.4.2.12 and may be ignored in all other sections of these procedures.
  • Page 71 8. Press the AP DISC/TRIM INT switch to disengage the autopilot. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 65 190-01938-00...
  • Page 72 20. Verify ROL and PIT are displayed on the GMC 605, GI 285, and PFD. 21. Press the APR button. 22. Verify VAPP displays on the GMC 605 in place of ROL. 23. Disengage the autopilot. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 66 190-01938-00 Revision 13...
  • Page 73 13. Verify that the flight director command bars indicate a right turn and that the flight controls drive to the right. 14. Press the AP DISC/TRIM INT Switch to disengage the autopilot. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 67 190-01938-00...
  • Page 74 VNV Check 1. If VNAV option is not enabled, press the VNV key on the GMC 605. 2. Verify that DISABLD KEY appears on the GMC 605. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 68 190-01938-00 Revision 13...
  • Page 75 PFD and GI 285 and that IAS is extinguished on the GI 285. 20. Press the AP DISC/TRIM INT switch on the pilot’s flight controls to disengage the autopilot. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 69 190-01938-00...
  • Page 76 PFD and GI 285 and that VS is extinguished on the GI 285. 20. Press the AP DISC/TRIM INT switch on the pilot’s flight controls to disengage the autopilot. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 70 190-01938-00...
  • Page 77 PFD and GI 285 and that ALT is extinguished on the GI 285. 13. Press the AP DISC/TRIM INT switch on the pilot’s flight controls to disengage the autopilot. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 71 190-01938-00...
  • Page 78 PIT is not illuminated. NOTE The flight director command bars and flight controls may move up or down as the GFC 600 AFCS is capturing the selected altitude. 9. Adjust the air data test set for 4000 ft. altitude at a vertical speed of 500 fpm.
  • Page 79 25. Verify that LVL and LVL are displayed in green and HDG and PIT are extinguished on the GI 285 and the PFD. 26. Verify that the autopilot stops driving the flight controls. GFC 600 AFCS Part 23 AML STC Maintenance Manual Page 73 190-01938-00...
  • Page 80 GFC 600 AFCS wiring diagrams o Provide an annotated copy (showing wiring installed) of the wiring diagrams from the GFC 600 AFCS Part 23 AML STC Installation Manual (190-01937-00) o Provide a copy of the wiring information contained on the appropriate model-...
  • Page 81 GSA 87 or GSA 80 or GSA 81 Roll Servo Part Number_______________________________________________________________ Serial Number______________________________________________________________ Mod Level_________________________________________________________________ GSA 87 or GSA 80 or GSA 81 Pitch Trim Servo (if installed) Part Number_______________________________________________________________ Serial Number______________________________________________________________ Mod Level_________________________________________________________________ GFC 600 AFCS Part 23 AML STC Maintenance Manual Page A-2 190-01938-00 Revision 13...
  • Page 82 GSM 86 Pitch Trim Servo Gear Box (if installed) Part Number_______________________________________________________________ Serial Number______________________________________________________________ Mod Level_________________________________________________________________ GSM 86 Yaw Damper Servo Gear Box (if installed) Part Number_______________________________________________________________ Serial Number______________________________________________________________ Mod Level_________________________________________________________________ GFC 600 AFCS Part 23 AML STC Maintenance Manual Page A-3 190-01938-00 Revision 13...
  • Page 83 Use Table A-1 to document GFC 600 AFCS system interfaces with other Garmin equipment installed in the aircraft. GFC 600 AFCS system interfaces to all equipment listed in Table A-1 are covered by this STC. Refer to installation specific interconnect diagrams retained with the aircraft permanent records for detailed equipment interface information.
  • Page 84 Use Table A-2 to document GFC 600 AFCS system interfaces with other equipment installed in the aircraft, but not listed in Table A-1. Refer to the GFC 600 AFCS Part 23 STC Installation Manual, 190-01937-00, to determine whether interfaces between the GFC 600 AFCS and the equipment listed in Table A-2 are covered by this STC.
  • Page 85  PHOTOCELL  14VDC  28VDC  5VDC  5VAC SOURCE TRANSITION GMC DSP > LIGHTBUS DISP page 1/2 GMC DSP > LIGHTBUS DISP page 2/2 GMC DSP > LIGHTBUS KEYS page 1/2 GFC 600 AFCS Part 23 AML STC Maintenance Manual Page A-6 190-01938-00 Revision 13...
  • Page 86 GMC DSP > CONTRAST page OFFSET RMT DSP > BACKLGHT page  PHOTOCELL  14VDC  28VDC  5VDC  5VAC SOURCE TRANSITION RMT DSP > LIGHTBUS page 1/2 GFC 600 AFCS Part 23 AML STC Maintenance Manual Page A-7 190-01938-00 Revision 13...
  • Page 87 Configuration Item Setting RMT DSP > LIGHTBUS page 2/2 RMT DSP > PHOTOCEL page 1/2 RMT DSP > PHOTOCEL page 2/2 TEST > AUDIO page Volume GFC 600 AFCS Part 23 AML STC Maintenance Manual Page A-8 190-01938-00 Revision 13...
  • Page 88 Record equipment locations and sketch the approximate location of wire routing in or as applicable. Figure A-1 – Equipment Location and Wire Routing – Single Engine Airplane GFC 600 AFCS Part 23 AML STC Maintenance Manual Page A-9 190-01938-00 Revision 13...
  • Page 89 Figure A-2 – Equipment Location and Wire Routing – Twin Engine Airplane GFC 600 AFCS Part 23 AML STC Maintenance Manual Page A-10 190-01938-00 Revision 13...

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