Garmin GFC 600H Pilot's Manual
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Garmin GFC 600H Pilot's Manual

Garmin GFC 600H Pilot's Manual

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Pilot's Guide

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  • Page 1 GFC 600H ™ Pilot’s Guide...
  • Page 3 Garmin is a registered trademarks of Garmin Ltd. or its subsidiaries. This trademark may not be ® used without the express permission of Garmin.
  • Page 4 WARNING: For safety reasons, system operational procedures must be learned on the ground. WARNING: The Garmin system, as installed in this rotorcraft, has a very high degree of functional integrity. However, the pilot must recognize that providing monitoring and/or self-test capability for all conceivable system failures is not practical.
  • Page 5 (iv) damage caused by service performed by anyone who is not an authorized service provider of Garmin; or (v) damage to a product that has been modified or altered without the written permission of Garmin. In addition, Garmin reserves the right to refuse warranty claims against products or services that are obtained and/or used in contravention of the laws of any country.
  • Page 6 Distributor warranties are only valid in the area of intended distribution. Devices purchased in the U.S. or Canada must be returned to the Garmin service center in the U.K., the U.S., Canada or Taiwan for service.
  • Page 7 (“THE GARMIN PRODUCT”), YOU AGREE TO BE BOUND BY THE TERMS AND CONDITIONS OF THE FOLLOWING SOFTWARE LICENSE AGREEMENT. PLEASE READ THIS AGREEMENT CAREFULLY. Garmin Ltd. and its subsidiaries (“Garmin”) grants you a limited license to use the software embedded in the Garmin Product (the “Software”) in binary executable form in the normal operation of the Garmin Product.
  • Page 8 Part Number Change Summary 190-02081-04 Initial release Date Description January, 2019 Production Release Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 9: Table Of Contents

    GMC 605H (3-Axis) ......................6 External Controls ........................7 1.4 System Indications ......................10 GMC 605H ........................10 Garmin PFD HFCS Indications ..................... 12 Section 2 Helicopter Flight Control System .............. 15 2.1 HFCS Operation ........................ 15 HFCS Pre-Flight ........................15 Engaging the Helicopter Flight Control System ..............
  • Page 10 ..................57 5.1 Equipment Terminology ....................57 5.2 System Operation Terminology ................... 57 5.3 Helicopter and System Controls .................. 59 5.4 Flight Director Modes ....................60 Section 6 Index ........................Index-1 Index ...........................Index-2 Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 11: Section 1 System Overview

    • Attitude Hold (ATT) (FCS Key) — Attitude Hold Mode (ATT) is the primary operating mode of the GFC 600H system. When in ATT the system moves the primary flight controls to maintain a pitch and roll attitude set by the pilot. ATT can be used throughout the entire flight envelope.

  • Page 12: Hfcs Equipment

    The basic GFC 600H system is comprised of the following equipment: GMC 605H MODE CONTROLLER The panel-mounted GMC 605H serves as the primary user interface for the GFC 600H. The GMC provides mode selection buttons and a wheel for convenient adjustment of the flight director vertical references.

  • Page 13: Gfs 83 Servo

    This servo contains a mechanical clutch to engage the motor drive to the servo output. The mechanically clutched variant of the GFS 83 is typically installed in the yaw axis. 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...

  • Page 14: Attitude And Air Data Sensors

    The GMU 44 magnetometer is interfaced to both the primary attitude sensor and to the GMC 605H. Air data may be provide by a Garmin GDC 72H or a GDC 74H air data computer. The GDC 72H/74H is a remotely mounted Air Data Computer which connects to the existing pitot-static system and a GTP 59 OAT probe.
  • Page 15 GRS 79H and GDC 72H into a single unit providing attitude and air data. GSU 75H A Garmin GPS is required as an aiding source for AHRS and for GPS based modes including Groundspeed Hold and GPS navigation. COLLECTIVE POSITION SENSOR For some installations, a position sensor will provide collective position to the GFC 600H to improve FCS performance.

  • Page 16: Hfcs Controls

    LVL Key Engages the Flight Control System in Level Mode (or selects Level Mode if Flight Control System is already engaged). ALT Key Selects/deselects Altitude Hold Mode HDG Key Selects/deselects Heading Select Mode Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 17: External Controls

    These controls provide FCS control functions but are not found on the GMC 605H. The position of switches/controls may vary per installation. Refer to NOTE: the rotorcraft flight manual supplement for installation specific controls and operation. FCS DISC TRIM LVL MODE Cyclic Switches 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...
  • Page 18 CPLD Flight Director Modes: The trim switch changes the reference altitude, vertical speed, or indicated airspeed, as applicable. Engages the pitch, roll, and optional yaw axis in Level Mode Cyclic (Blue) LVL Mode. Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...
  • Page 19 Sets reference attitude to current attitude upon axis value, if a FD mode is FTR Button release. Reduces breakout force while pressed. active, otherwise sets the reference attitude to the current attitude. External Control Adjustments By Mode 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...

  • Page 20: System Indications

    Modes Mode GMC 605H LCD Display The LEDs adjacent to the FCS, FD, and CPL keys are illuminated in conjunction with other information on the LCD to provide status and alert information. Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...
  • Page 21 The yaw servo is engaged via the collective mounted Yaw ON/OFF switch. When a servo indicates that it is Out of Detent the FCS is no CAUTION: longer maintaining the reference in that axis and the pilot must be in control. 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...

  • Page 22: Garmin Pfd Hfcs Indications

    GMC 605H Servo Status GARMIN PFD HFCS INDICATIONS A Garmin PFD (GDU 620 or GDU TXi) (if installed) can display Flight Director command bars, active and armed mode annunciations, FCS references, servo status, and HFCS alerts. Bugs are displayed along with digital references for Selected Heading, Vertical Speed, Selected Altitude, and Indicated Airspeed.
  • Page 23 HFCS Status Annunciations on Garmin GDU 620 PFD FLIGHT DIRECTOR COMMAND BARS (DECOUPLED) In installations with the GFC 600H interfaced with a Garmin PFD, the HFCS provides Flight Director Command Bars when the Flight Director is decoupled from the servos.
  • Page 24 System Overview Blank Page Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 25: Section 2 Helicopter Flight Control System

    Supplements for additional details regarding required checks. Any discrepancies must be resolved before flight. Upon power-up the GFC 600H will automatically perform a Pre-Flight Test (PFT) to check internal GMC 605H functions, interfaces, and servo status. While the test is in progress the GMC displays the message PFT.

  • Page 26: Engaging The Helicopter Flight Control System

    LVL key. This will engage the pitch, roll and optional yaw servos with the attitude references set to a level flight attitude. The rotorcraft must be within the GFC 600H engagement limits in order to engage the Helicopter Flight Control System. The engagement limits vary by airframe.

  • Page 27: Flight Director Modes

    The Flight Director is automatically disabled if the information required to compute the default Flight Director modes becomes invalid or unavailable. FLIGHT DIRECTOR Flight Director command bars may be displayed on a Garmin PFD. NOTE: The Flight Director function provides pitch and roll commands to the Helicopter Flight Control System and displays them on the PFD.
  • Page 28 Command Bars represent the direction the pilot should pitch and/or bank the aircraft to center Command Bars on the aircraft symbol. Lateral Axis Command Bar Vertical Axis Command Bar Flight Director Command Bars on Garmin GDU 620 PFD Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...
  • Page 29 The GFC 600H system supports flight in the pitch and/or roll axes. When coupling a single axis to the flight director, the remaining axis operates in ATT. This state is indicated on the GMC and optional PFD by showing ‘ATT’ in the corresponding mode field.

  • Page 30: Basic Helicopter Flight Control System Features

    Groundspeed Hold (GSPD) Mode requires a GTN navigator to be NOTE: installed and interfaced to the GFC 600H. Below a configurable ground speed threshold, the system can optionally transition to Ground Speed (GSPD) Hold Mode. Ground Speed Hold Mode is a sub-mode of Attitude Hold Mode in which the control of attitude is augmented to achieve a control objective of constant lateral and longitudinal ground speed.
  • Page 31 This feature is particularly useful when augmenting the pilot controls and stabilizing the aircraft while the pilot is hand-flying. This functionality requires the pilot to operate the cyclic controls with a loose grip to utilize the benefit while hand-flying. 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...
  • Page 32 Level Mode may be helpful if the rotorcraft is inadvertently flown NOTE: into IMC conditions. gmc 605h A nnunciAtions The GMC 605H annunciates ‘LVL’ in both the vertical and lateral sections. GMC 605H Annunciating Level Mode Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 33: Vertical Flight Director Modes

    AFMS the Selected Altitude Maintains the current Varies by Indicated rotorcraft airspeed; rotorcraft Airspeed may be used to 1 kt type, see (IAS) climb/descend to the AFMS Selected Altitude 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...

  • Page 34: Altitude Hold Mode (Alt)

    Glideslope the ILS glideslope on approach * When the GFC 600H is receiving a Selected Altitude value from a Garmin PFD, ALTS is armed automatically when VS or IAS modes are active. Helicopter Flight Control System Vertical Mode Summary ALTITUDE HOLD MODE (ALT) Altitude Hold mode can be activated by pressing the ALT key;...

  • Page 35: Selected Altitude Capture Mode (Alts)

    GMC 605H ANNUNCIATIONS The GMC 605H annunciates ‘ALT’ for Altitude Hold mode. If a Garmin PFD is installed, the GMC also shows the reference altitude in the mode reference section. GMC 605H Annunciating Altitude Hold Mode...
  • Page 36 VS or IAS. GMC 605H Altitude Select Indications (ALTS Armed) Coupled Vertical Lateral Modes Servo Status Status Modes Active Active Armed Selected Altitude HFCS Status Annunciations on Garmin PFD (Altitude Select - ALTS Armed) Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 37: Vertical Speed Mode (Vs)

    Altitude Capture mode is available in this rotorcraft, this mode may be used for climb or descent to the Selected Altitude since Selected Altitude Capture mode is automatically armed when Vertical Speed mode is selected. 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...

  • Page 38: Indicated Airspeed Mode (Ias)

    IAS reference synchronizes to the current rotorcraft airspeed and subsequently maintains that airspeed. The IAS reference can be changed using the beep trim switch, NOSE UP/DN wheel, or airspeed bug on the PFD (TXi only). Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 39: Glidepath Mode (Gp)

    In that case GP will never become the active vertical mode. Glidepath mode is used to track a glidepath generated by a GPS navigator with WAAS or other Satellite Based Augmentation System (SBAS) capability. 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...
  • Page 40 HSI as LNAV or LNAV+V are considered Nonprecision Approaches (NPA) and are flown to an MDA even though vertical glidepath (GP) information may be provided and the HFCS will capture and track the vertical guidance. Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 41: Glideslope Mode (Gs)

    3) GMC 605H: Press the APR key. This simultaneously arms LOC and GS (Glideslope) modes. If the current vertical mode is ATT then IAS will become the active mode with GS armed. 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...
  • Page 42 • Must be captured from below the glideslope. GMC 605H ANNUNCIATIONS The GMC 605H annunciates ‘GS’ for Glideslope mode. Since Glideslope mode relies on LOC lateral guidance, the ‘LOC’ lateral mode is also annunciated. GMC 605H Annunciating Glideslope Mode Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 43: Lateral Modes

    Captures and tracks the selected Approach, VOR Capture/ approach navigation source (GPS, VOR, VAPP Track LOC) Approach, LOC Capture/ Track (Glideslope mode automatically armed) Helicopter Flight Control System Lateral Mode Summary 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...

  • Page 44: Heading Select Mode (Hdg)

    Selected Heading. Turn the HDG Knob on the HSI to set the Selected Heading. When using a Garmin PFD, turns are commanded in the same direction as Selected Heading Bug movement, even if the Bug is turned more than 180˚ from the present heading (e.g., a 270˚...

  • Page 45: Navigation Modes (Gps, Vor, Loc, Bc)

    (GPS, VOR, LOC) as provided by a GPS navigator or VHF Nav radio and currently selected for use on the HSI interfaced to the GFC 600H. When GPS is the selected navigation source the Flight Director will follow GPS Roll Steering commands.
  • Page 46 GMC 605H ANNUNCIATIONS The GMC 605H annunciates the appropriate lateral mode as GPS, VOR, LOC, or BC depending on the selected navigation source when the NAV key was pressed. Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 47: Approach Modes (Gps, Vapp, Loc)

    Availability of Approach Modes depends on the installed navigation NOTE: equipment capabilities and interfaces. The selected navigation receiver must have a valid VOR or LOC NOTE: signal or active GPS course for the Flight Director to enter Approach Mode. 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...
  • Page 48 (GPS, VOR, or LOC), selected and currently selected for use on the HSI interfaced to the GFC 600H. This mode uses roll steering for GPS approach guidance or the selected navigation receiver deviation and selected course inputs to fly the approach.
  • Page 49 VOR to VOR, or from LOC to LOC) • Navigation source switched (e.g. GPS to VOR/LOC, or VOR to LOC) • Loss of navigation signal 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...

  • Page 50: Flying An Arc With A Gps Navigator

    GPS Navigation mode. If at any point while established on the arc the pilot deselects GPS Navigation mode, the HFCS will no longer track the arc. Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 51: Visual Approaches

    HFCS VISUAL APPROACHES When paired with a Garmin GTN navigator, the GFC 600H system can reduce pilot workload by allowing visual approaches to be flown coupled to the flight control system. Selecting a Visual Approach: 1) EXTERNAL NAVIGATOR: Select the destination airport on the moving map and activate a direct-to.

  • Page 52: Limit Cueing

    When limit cueing is active the pilot can press the FCS DISC switch to remove limit cue forces. Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...
  • Page 53 H-ESP Roll Operating Range When Engaged (LIMITS VARY BY INSTALLATION) (Force Increases as Roll Increases & Decreases as Roll Decreases) Limit Cue is automatically disengaged if the rotorcraft reaches the Helicopter Flight Control System roll engagement attitude limit. 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...

  • Page 54: Overspeed Protection

    Pitch H-ESP function. Reference the RFMS for the Pitch H-ESP limits for a specific rotorcraft. OVERSPEED PROTECTION Overspeed Protection is not active in Indicated Airspeed Hold (IAS) NOTE: mode. While Overspeed Protection is active, the rotorcraft will deviate from NOTE: the selected reference. Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...
  • Page 55 The GFC 600H system computes the current Vne based on CAUTION: altitude and/or temperature. The GFC 600H does not adjust Vne based on aircraft weight, configuration, or operation. It is the pilot’s responsibility to know the current applicable Vne for the rotorcraft and operate within the Vne limit regardless of FCS mode of operation.

  • Page 56: Low Speed Protection

    HFCS HFCS Overspeed Indication on Garmin PFD When the overspeed condition is resolved the MAXSPEED message is removed and the armed vertical mode becomes active again. LOW SPEED PROTECTION While Low Speed Protection is active, the rotorcraft will deviate from NOTE: the selected reference.
  • Page 57 Use the cyclic trim switch or GMC 605 NOSE UP/DN wheel to reduce the armed mode reference (decrease VS or ALT). • Change the FCS vertical mode to IAS or ATT. • Disengage the HFCS. GMC 605H Underspeed Protection 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...
  • Page 58 HFCS Blank Page Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 59: Section 3 Annunciations & Alerts

    SECTION 3 ANNUNCIATIONS & ALERTS 3.1 VISUAL ANNUNCIATIONS AND ALERTS The GFC 600H provides visual annunciations and alerts to notify the pilot of system status, failures, degraded operation, and conditions requiring specific pilot action. The table below summarizes the messages that may appear on the GMC 605H’s display along with any associated LED illumination, and a brief description.
  • Page 60 VNE LMTQ OFF exceedances. Overspeed and Lowspeed protection remains operational. Preflight test is in progress • PFT FAIL Preflight test has failed MANIFEST Incorrect Manifest versions. Maintenance is required. Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...
  • Page 61 The ALT key on the GMC 605H is stuck in the active ALT KEY state The LVL key on the GMC 605H is stuck in the active LVL KEY state CAS Messages 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...

  • Page 62: Pfd Visual Annunciations And Alerts

    Servo engaged and out of detent (more than 10 seconds) Flashing inverse video Keeps flashing until returned to detent Transition from servos engaged to servos disengaged Flashing inverse video for 5 seconds PFD Servo Status Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 63: Aural Alerts

    PFD Coupled Status 3.2 AURAL ALERTS The GFC 600H outputs aural annunciations and alerts to provide enhanced awareness to the pilot of several key HFCS conditions. VOICE ALERTS Voice alerts are played through the rotorcraft audio panel and are heard through the headset and/or cockpit speaker depending on installation and audio panel selections.

  • Page 64: Flight Control System Disconnect Alert

    Abnormal (automatic) disengagement results in the alert being played continuously until silenced by the FCS DISC or FTR button. The alert is also played at the end of Preflight Test to notify the pilot that PFT is complete. Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 65: Section 4 Abnormal Operation

    Abnormal Operation SECTION 4 ABNORMAL OPERATION 4.1 SUSPECTED FLIGHT CONTROL SYSTEM MALFUNCTION Refer to the RFMS for abnormal operations. 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...
  • Page 66 Blank Page Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 67: Section 5 Terms & Conventions

    Air Data and Attitude Heading Reference System. The GSU 75H GSU 75H ADAHRS ADAHRS is the primary attitude source for the GFC 600H system and to provide air data for Flight Director Modes. Flight Control System or Helicopter-Flight Control System. This FCS or H-FCS terminology is used rather than autopilot.
  • Page 68 OFF. H-ESP (Limit Cue STBY (Standby) protection) is still active when the system is in standby to protect the pilot from exceeding the operating limits of the helicopter. System Operation Terminology Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 69: Helicopter And System Controls

    FTR will reset the vertical descent to the new condition. While pressed the forces required to move the controls out of detent are reduced. Helicopter and System Controls 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...

  • Page 70: Flight Director Modes

    Mode Description Allows the aircraft to capture the altitude selected on an interfaced ALTS (Selected Garmin PFD. When activating the Airspeed Mode or Vertical Altitude Capture Speed Hold Mode, the system will fly to the selected altitude, and Mode) maintain that altitude by transitioning to Altitude Hold Mode.
  • Page 71 Heading Select Mode HDG Key 6 Heading Select Mode 34 Command Bars 18, 19 Helicopter Flight Control System 15 Features 20 Modes 23 Directional Gyros Operation 15 HFCS. Helicopter Flight Control Index-1 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...
  • Page 72 VNV Key 7 VOICE ALERTS 53 Navigation Modes (GPS, VOR, LOC) 35 VOR. NAV Key 7 VS 27 NOSE UP/DN Wheel 7 Yaw Damper Overspeed Protection 42, 44 YD Key 6 Index-2 Garmin GFC 600H Pilot’s Guide 190-02081-04 Rev. A...

  • Page 73: Section 6 Index

    Index Index-3 190-02081-04 Rev. A Garmin GFC 600H Pilot’s Guide...
  • Page 74 Southampton, Hampshire SO40 9LR U.K. Garmin Corporation No. 68, Zhangshu 2nd Road Xizhi District, New Taipei City, Taiwan Contact Garmin Product Support at www.flygarmin.com. For warranty information refer to https://fly.garmin.com/fly-garmin/support/warranty-information/ 190-02081-04 Rev. A © 2019 Garmin Ltd. or its subsidiaries...

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