Garmin GFC™ 600 Digital Autopilot Owner's manual

GFC 600 Autopilot Installed in Textron Aviation 525 190-02011-15 Rev. 1

Page 2 of 53 FAA APPROVED

Garmin Ltd. or its subsidiaries

Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted,

disseminated, downloaded or stored in any storage medium, for any purpose without the express prior

written consent of 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 to

print one copy of this manual or of any revision hereto, provided that such electronic or printed copy of this

manual or revision must contain the complete text of this copyright notice and provided further that any

unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited.

Garmin International, Inc.

1200 E. 151

st

Street

Olathe, KS 66062 USA

Telephone: 913-397-8200

www.garmin.com

190-02011-15 Rev. 1 GFC 600 Autopilot Installed in Textron Aviation 525

FAA APPROVED Page 3 of 53

Garmin International, Inc

Log of Revisions

FAA Approved Airplane Flight Manual Supplement for

GFC 600 Autopilot

Installed in Textron Aviation 525

REV

NO.

PAGE NO(S) DESCRIPTION

DATE OF

APPROVAL

FAA APPROVED

1 ALL Original Issue See Cover See Cover

GFC 600 Autopilot Installed in Textron Aviation 525 190-02011-15 Rev. 1

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Table of Contents

Section 1 – General ....................................................................................................... 7

Use of The Supplement........................................................................................................................... 7

Symbols Used for Procedure Division .................................................................................................. 7

Abbreviations and Terminology ............................................................................................................ 8

Installed Equipment Interfaces .............................................................................................................. 9

Installed Features Checklist ................................................................................................................. 10

Section 2 – Limitations ............................................................................................... 11

Section 3 – Emergency Procedures .......................................................................... 12

Section 3A – Abnormal Procedures .......................................................................... 20

Section 4 – Normal Procedures ................................................................................. 30

GFC 600 Power Up ................................................................................................................................ 30

Flight Director / Autopilot Normal Operating Procedures................................................................. 30

Vertical Modes ..................................................................................................................................... 33

Lateral Modes ...................................................................................................................................... 37

Approaches .......................................................................................................................................... 38

Other Modes ........................................................................................................................................ 40

Section 5 – Performance ............................................................................................ 41

Section 6 – Weight and Balance ................................................................................ 43

Section 7 – System Description ................................................................................. 45

GFC 600 Autopilot Installed in Textron Aviation 525 190-02011-15 Rev. 1

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190-02011-15 Rev. 1 GFC 600 Autopilot Installed in Textron Aviation 525

FAA APPROVED Page 7 of 53

Section 1 – General

The information in this supplement is FAA-approved material and must be attached to the Pilot’s Operating

Handbook and FAA Approved Airplane Flight Manual (POH/AFM) when the airplane has been modified by

installation of the Garmin GFC 600 Autopilot system in accordance with Garmin International, Inc. approved

data.

The information in this supplement supersedes or adds to the basic POH/AFM only as set forth below.

Users of the manual are advised to always refer to the supplement for possibly superseding information

and placarding applicable to operation of the airplane.

USE OF THE SUPPLEMENT

References in the basic Aircraft Flight Manual to the “Honeywell Flight Guidance System”, “Flight Guidance

System”, or “autopilot” now refer to the GFC 600 autopilot except as specifically noted.

The following definitions apply to WARNINGS, CAUTIONS and NOTES found throughout the supplement:

WARNING

OPERATING PROCEDURES, TECHNIQUES, ETC., WHICH CAN RESULT IN

PERSONAL INJURY OR LOSS OF LIFE IF NOT CAREFULLY FOLLOWED.

CAUTION

OPERATING PROCEDURES, TECHNIQUES, ETC., WHICH CAN RESULT IN DAMAGE

TO EQUIPMENT IF NOT CAREFULLY FOLLOWED.

NOTE

An operating procedure, technique, etc., which is considered essential to emphasize.

SYMBOLS USED FOR PROCEDURE DIVISION

Symbols are used to mark different parts of procedures. A decision must be made by the pilot to identify

the applicable part of the procedure. After the initial choice has been made, a further division of the

procedure is possible. In that case, a second choice must be made, etc. When a choice has been made,

all remaining actions, consequences, and references re listed. When the procedure is no longer required,

it will be indicated by “Procedure Completed”.

 FIRST DIVISION

 SECOND DIVISION

 THIRD DIVISION

 FOURTH DIVISION

GFC 600 Autopilot Installed in Textron Aviation 525 190-02011-15 Rev. 1

Page 8 of 53 FAA APPROVED

ABBREVIATIONS AND TERMINOLOGY

The following glossary is applicable within the Airplane Flight Manual Supplement:

AFCS Automatic Flight Control System

AGL Above Ground Level

AFM Airplane Flight Manual

AFMS Airplane Flight Manual Supplement

AP Autopilot

BC Back Course Approach

CDI Course Deviation Indicator

CWS Control Wheel Steering

DA Decision Altitude

EDM Emergency Descent Mode

ESP Electronic Stability and Protection

FAA Federal Aviation Administration

GA Go Around

GFC 600 Garmin Autopilot

GI 285 Garmin Remote Autopilot Mode Annunciator Panel

GMC 605 Autopilot Mode Control Panel

GPS Global Positioning System

HDG AFCS heading mode

HSI Horizontal Situation Indicator

ILS Instrument Landing System

KIAS Knots Indicated Airspeed

KTS Knots

LED Light Emitting Diode

LNAV Lateral Navigation

LNAV + V Lateral Navigation with Advisory Vertical Guidance

LNAV/VNAV Lateral Navigation / Vertical Navigation Approach

LOC Localizer (no glideslope available)

LP Localizer Performance

LP+V Localizer Performance with Advisory Vertical Guidance

LPV Localizer Performance with Vertical Guidance

MDA Minimum Descent Altitude

N/A Not Applicable

OEI One Engine Inoperative

POH Pilot’s Operating Handbook

RVSM Reduced Vertical Separation Minimum

SSEC Static Source Error Correction

STC Supplemental Type Certificate

VHF Very High Frequency

VNAV Vertical Navigation

VOR VHF Omni-directional Range

190-02011-15 Rev. 1 GFC 600 Autopilot Installed in Textron Aviation 525

FAA APPROVED Page 9 of 53

INSTALLED EQUIPMENT INTERFACES

The following is the list of installed equipment and functions associated with the GFC 600 Autopilot

installation in this airplane.

DEVICE TYPE Manufacturer / Model

If not installed, note N/A

Additional Information

GPS Navigator #1

Roll Steering Capable?



YES



NO

Vertical Navigation Capable?



YES



NO

Is GPS #1 MapMX data provided to

GFC 600 internal attitude source?



YES



NO

GPS Navigator #2

Roll Steering Capable?



YES



NO

Is #2 GPS navigation i

nterfaced to

GFC 600?



YES



NO

Vertical Navigation Capable?



YES



NO

Is GPS #2 MapMX data provided to

GFC 600 internal attitude source?



YES



NO

Primary Flight Display

Air Data Computer

Is air data provided to GFC 600

internal attitude source?



YES



NO

VHF Nav Radio #1

Is #1 NAV interfaced to TXi PFD?



YES



NO

VHF Nav Radio #2

Is #2 NAV interfaced to TXi PFD?



YES



NO

GFC 600 Autopilot Installed in Textron Aviation 525 190-02011-15 Rev. 1

Page 10 of 53 FAA APPROVED

INSTALLED FEATURES CHECKLIST

The checked autopilot modes and features are available on this aircraft.

Basic AP Features



Flight Director



Control Wheel Steering



Yaw Damper



Manual Electric Pitch Trim



Auto Pitch Trim



Overspeed Protection



Underspeed Protection

Vertical Autopilot Modes



Pitch (PIT)



Level (LVL)



Go Around (GA)



Altitude Hold (ALT)



Vertical Speed (VS)



Altitude Capture via Alt Preselect (ALTS)



Indicated Airspeed (IAS)



Vertical Navigation (VNV)



GPS Approach Glidepath (GP)



ILS Glideslope (GS)

Electronic Stability and Protection



Pitch/Roll Attitude



High Speed Protection



Low Speed Protection

Emergency Descent Mode



Manual Activation



Automatic Activation

Lateral Autopilot Modes



Roll (ROL)



Level (LVL)



Go Around (GA)



Heading (HDG)



GPS Navigation (GPS)



Roll Steering



VHF Navigation



VOR (VOR)



Approach Mode



GPS (GPS)



VOR (VAPP)



Localizer (LOC)



Localizer Backcourse (BC)

190-02011-15 Rev. 1 GFC 600 Autopilot Installed in Textron Aviation 525

FAA APPROVED Page 11 of 53

Section 2 – Limitations

This AFMS is applicable to the software versions shown below:

Software Item

Software Version

(or later FAA Approved version for this STC)

GFC 600 Software Version

V384000

This AFMS must be attached to the Pilot’s Operating Handbook and FAA Approved Airplane Flight Manual.

The GFC 600 Pilot’s Guide, P/N 190-01488-00, must be available to the pilot when using the GFC 600.

One pilot must be seated in his/her seat, with seatbelt fastened, during all autopilot operations.

Use of the autopilot or yaw damper during takeoff and landing or during a single-engine go around is

prohibited.

Emergency Descent Mode (EDM) is for emergency use only. Intentional activation of EDM, for other than

an emergency, is prohibited.

The GFC 600 AFCS preflight test must complete successfully prior to use of the autopilot, flight director or

manual electric trim.

Autopilot maximum engagement speed is 263 KIAS at and below 30,500 ft.

Autopilot maximum engagement speed is 0.71 M above 30,500 ft.

Autopilot minimum engagement speed is 95 KIAS below 18,000 FT.

Autopilot minimum engagement speed is 130 KIAS at and above 18,000 ft.

The autopilot must be disengaged below 200 ft AGL during coupled approaches with vertical navigation

and below 800 ft AGL during all other operations.

The GFC 600 autopilot is approved for Category 1 precision approaches and non-precision approaches

only.

Maximum fuel imbalance with autopilot engaged is 200 lbs.

For aircraft which do not have a GTN Navigator installed the maximum speed for LOC, BC, and VAPP

captures greater than 45° is 140 KIAS.

Automatic GPS-to-LOC CDI switching must be disabled when using NAV/APR modes unless the following

conditions are met:

GMC 605 software version 2.50 or later

AND

GTN 6XX/7XX software version 6.70 or later

AND

G600 TXi with software version 3.10 or later.

NOTE

The GFC 600 installation does not change the previously approved Kinds of Operation.

Refer to the aircraft AFM.

GFC 600 Autopilot Installed in Textron Aviation 525 190-02011-15 Rev. 1

Page 12 of 53 FAA APPROVED

Section 3 – Emergency Procedures

Some emergency situations require immediate memorized corrective action. These steps enclosed in

boxes in the emergency procedures and should be accomplished without the aid of the checklist.

 AUTOPILOT MALFUNCTION

1. Control Wheel – GRIP FIRMLY.

2. AP DISC / TRIM INT Button – PRESS AND HOLD.

3. Aircraft Attitude – MAINTAIN / REGAIN AIRCRAFT CONTROL.

4. Manual Elevator Trim – AS REQUIRED.

5. AUTOPILOT Circuit Breaker – PULL.

6. AP DISC / TRIM INT Button – RELEASE.

WARNING

IN FLIGHT, DO NOT OVERPOWER THE AUTOPILOT. THE PITCH TRIM WILL

OPERATE IN THE DIRECTION OPPOSING THE OVERPOWER FORCE, WHICH WILL

RESULT IN LARGE OUT-OF-TRIM FORCES.

DO NOT ATTEMPT TO RE-ENGAGE THE AUTOPILOT OR USE MANUAL ELECTRIC

PITCH TRIM UNTIL THE CAUSE OF THE MALFUNCTION HAS BEEN CORRECTED.

CAUTION

DO NOT RELEASE THE AP DISC / TRIM INT BUTTON UNTIL AFTER PULLING THE

AUTOPILOT CIRCUIT BREAKER.

NOTE

• The autopilot monitors normally detect failure and automatically disengage the

autopilot.

• Pulling the AUTOPILOT circuit breaker will render the autopilot and yaw damper

inoperative.

Procedure completed

190-02011-15 Rev. 1 GFC 600 Autopilot Installed in Textron Aviation 525

FAA APPROVED Page 13 of 53

 ELEVATOR TRIM RUNAWAY

1. Control Wheel – GRIP FIRMLY.

2. AP DISC / TRIM INT Button – PRESS AND HOLD.

3. Aircraft Attitude – MAINTAIN / REGAIN AIRCRAFT CONTROL.

4. Throttles – AS REQUIRED

5. Speed Brakes – AS REQUIRED

6. Manual Elevator Trim – AS REQUIRED.

7. AUTOPILOT Circuit Breaker (R Panel) – PULL.

8. AP DISC / TRIM INT Button – RELEASE.

WARNING

IN FLIGHT, DO NOT OVERPOWER THE AUTOPILOT. THE PITCH TRIM WILL

OPERATE IN THE DIRECTION OPPOSING THE OVERPOWER FORCE, WHICH WILL

RESULT IN LARGE OUT-OF-TRIM FORCES.

DO NOT ATTEMPT TO RE-ENGAGE THE AUTOPILOT OR USE MANUAL ELECTRIC

PITCH TRIM UNTIL THE CAUSE OF THE MALFUNCTION HAS BEEN CORRECTED.

NOTE

• The autopilot monitors normally detect failure and automatically disengage the

autopilot.

• Do not release the AP DISC / TRIM INT Button until after pulling the AUTOPILOT

circuit breaker.

• Pulling the AUTOPILOT circuit breaker will render the autopilot and yaw damper

inoperative.

Procedure completed

GFC 600 Autopilot Installed in Textron Aviation 525 190-02011-15 Rev. 1

Page 14 of 53 FAA APPROVED

 INADVERTENT STALL (STICK SHAKER, BUFFET, AND/OR ROLL-

OFF)

 IF BUFFET AND/OR ROLL-OFF

See AFM procedure “INADVERTANT STALL (STICK SHAKER, BUFFET, AND/OR ROLL-OFF)”

 IF STICK SHAKER WITH AUTOPILOT ON

See “UNDERSPEED PROTECTION (MINSPEED) ENGAGEMENT” procedure this section

 IF STICK SHAKER WITH AUTOPILOT OFF

See AFM procedure “INADVERTANT STALL (STICK SHAKER, BUFFET, AND/OR ROLL-OFF)”

NOTE

When autopilot is OFF and stick shaker activates, the pitch servo will engage and hold a

nose down force on the control wheel. If stick shaker is allowed to remain active for more

than approximately 10 seconds, the autopilot will automatically engage with LVL mode

selected.

 AUTOPILOT FAILURE / ABNORMAL DISCONNECT

1. AP DISC / TRIM INT Button – PRESS AND RELEASE.

2. Aircraft Attitude – MAINTAIN / REGAIN AIRCRAFT CONTROL.

NOTE

Autopilot failure / abnormal disconnect is indicated by a red LED illuminated next to the

AP key, AP FAIL in message window on GMC 605 display, and / or continuous aural tone.

The autopilot cannot be re-engaged if the AP FAIL annunciation present.

Procedure completed

190-02011-15 Rev. 1 GFC 600 Autopilot Installed in Textron Aviation 525

FAA APPROVED Page 15 of 53

 OVERSPEED PROTECTION (MAXSPEED SHOWN ON GMC 605

DISPLAY)

1. Throttles – REDUCE.

2. Aircraft Attitude and Altitude – MONITOR.

 AFTER OVERSPEED CONDITION IS CORRECTED

3. Autopilot – RESELECT VERTICAL AND LATERAL MODES AS NECESSARY.

4. Throttles – ADJUST AS NECESSARY.

NOTE

Overspeed protection will be accompanied by a MAXSPEED message on the GMC 605

display. Overspeed protection mode provides a pitch up command to decelerate the

airplane at or below the maximum autopilot operating speed. Overspeed protection will

not activate in altitude hold (ALT), glideslope (GS), or glidepath (GP) modes.

Procedure completed

 UNDERSPEED PROTECTION (MINSPEED SHOWN ON GMC 605

DISPLAY OR STICK SHAKER ACTIVE)

1. Throttles – MAXIMUM THRUST.

2. Aircraft Attitude and Altitude – MONITOR.

 AFTER STICK SHAKER DEACTIVATES

3. Autopilot – RESELECT VERTICAL AND LATERAL MODES AS NECESSARY

4. Throttles – ADJUST AS NECESSARY

NOTE

Underspeed protection is triggered by stick shaker activation when the autopilot is

engaged. When underspeed protection is active, the FD provides a pitch down

command to maintain 2 KIAS above stick shaker de-activation airspeed.

Procedure completed

GFC 600 Autopilot Installed in Textron Aviation 525 190-02011-15 Rev. 1

Page 16 of 53 FAA APPROVED

 AUTOPILOT EMERGENCY DESCENT MODE (EDM ON SHOWN ON

GMC 605 DISPLAY)

NOTE

The autopilot must be engaged for Autopilot Emergency Descent Mode to activate.

 AUTOMATIC ACTIVATION

 IF CAB ALT 10,000 FEET WARNING LIGHT ON AND MASTER WARNING

1. Oxygen Masks – DON and EMER.

2. Microphone Select Switches – MIC OXY MASK.

3. Throttle - IDLE.

4. Speed Brakes – EXTEND.

5. Passenger Oxygen – MAKE SURE passengers are receiving oxygen.

6. Passenger Advisory Switch – PASS SAFETY.

7. Transponder – EMERGENCY.

8. Altitude – MONITOR FOR LEVEL OFF AT 15,000 FEET MSL

 IF DESCENT INTO ICING CONDITIONS IS REQUIRED

9. Throttles – AS REQUIRED (maintain sufficient power, above 70% N

2

, to keep the ANTI-ICE

annunciators extinguished).

Procedure completed

 IF DESCENT INTO ICING CONDITIONS IS NOT REQUIRED

Procedure completed

 IF CABIN ALTITUDE IS NORMAL

1. EDM Inhibit Button – PRESS AND RELEASE.

 MANUAL ACTIVATION

1. Manual EDM Button – PRESS AND RELEASE.

2. Throttle - IDLE

3. Speed Brakes – EXTEND.

4. Passenger Advisory Switch – PASS SAFETY.

5. Transponder – EMERGENCY.

6. Altitude – MONITOR FOR LEVEL OFF AT 15,000 FEET MSL

 IF DESCENT INTO ICING CONDITIONS IS REQUIRED

7. Throttles – AS REQUIRED (maintain sufficient power, above 70% N

2

, to keep the ANTI-ICE

annunciators extinguished).

Procedure completed

190-02011-15 Rev. 1 GFC 600 Autopilot Installed in Textron Aviation 525

FAA APPROVED Page 17 of 53

 IF DESCENT INTO ICING CONDITIONS IS NOT REQUIRED

Procedure completed

GFC 600 Autopilot Installed in Textron Aviation 525 190-02011-15 Rev. 1

Page 18 of 53 FAA APPROVED

 TO EXIT EDM

1. AP DISC / TRIM INT or AP Button – PRESS AND RELEASE.

Procedure completed

WARNING

AUTOPILOT EDM WILL COMMAND AIRSPEED TO V

MO

/M

MO

MINUS 10 KNOTS AND

THUS WILL NOT ACHIEVE MAXIMUM DESCENT RATE. IF MAXIMUM DESCENT

RATE IS REQUIRED DISENGAGED THE AUTOPILOT AND HAND FLY THE

AIRPLANE.

CAUTION

WHILE EDM IS ACTIVE, THE AUTOPILOT CANNOT BE DISENGAGED BY

ACTUATING EITHER HALF OF THE MANUAL ELECTRIC TRIM SPLIT SWITCH. ONLY

THE AP DISC / TRIM INT OR AP BUTTON WILL DISENGAGE THE AUTOPILOT.

ALTITUDE PRE-SELECT AND AIRSPEED REFERENCES ARE LOCKED OUT AND

CANNOT BE CHANGED WHILE EDM IS ACTIVE VIA ANY COCKPIT CONTROL.

NOTE

Refer to the G600 TXi AFMS for location of manual EDM activation and EDM inhibit

buttons. After level-off, the pilot must retract the speed brakes and apply thrust to resume

normal flight. If the airplane slows and the stick shaker activates, the autopilot will enter

Underspeed Protection.

 AC POWER FAILURE (INVERTER FAIL 1 AND 2 CAUTION LIGHT

AND AC FAIL WARNING LIGHT ON, MASTER CAUTION AND

MASTER WARNING) DUAL INVERTER FAILURE

The note stating, “The Honeywell Flight Guidance System will be inoperative.” is not applicable with

the GFC 600 installed. Remainder of AFM procedure is unchanged.

 EFIS FAILURE (FLIGHT GUIDANCE COMPUTER FAILURE)

The statement in step 1. of “IF EFIS STILL DISPLAYS RED X, OR BOTH DISPALYS BLANK” for

“The autopilot will be inoperative” is not applicable with the GFC 600 installed. Remainder of AFM

procedure is unchanged.

 AC POWER FAILURE (INVERTER FAIL WARNING LIGHT ON AND

MASTER WARNING)

The note stating, “The Honeywell Flight Guidance System will be inoperative.” is not applicable with

the GFC 600 installed. Remainder of AFM procedure is unchanged.

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GFC 600 Autopilot Installed in Textron Aviation 525 190-02011-15 Rev. 1

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Section 3A – Abnormal Procedures

 ELECTRONIC STABILITY AND PROTECTION (ESP) ACTIVATION

1. Throttles – ADJUST AS NECESSARY.

2. Aircraft Attitude – MAINTAIN / REGAIN AIRCRAFT CONTROL

3. LVL Key – PRESS TO ENGAGE AUTOPILOT

NOTE

If ESP is active for at least 50% of the last 20 seconds, the autopilot will automatically

engage in LVL mode, an aural “ENGAGING AUTOPILOT” will be played, and the autopilot

will roll the wings level and fly at zero-vertical speed. Refer to Section 7 – System

Description for further information.

 AFTER RECOVERY

4. Autopilot – RESELECT VERTICAL AND LATERAL MODES AS NECESSARY

Procedure completed

 AUTOPILOT PRE-FLIGHT TEST FAIL

Illumination of the red LED next to the AP key and AP FAIL on the GMC 605 display indicates the

AFCS system failed the automatic Pre-Flight test. The autopilot, yaw damper, ESP, and electric

elevator trim are inoperative. Flight Director may still function.

 LOSS OF AIR DATA (AIRDAT FAIL ON GMC 605 DISPLAY)

 IF TXi PFD INSTALLED WITH DUAL ADC SOURCES

1. G600 TXi AFMS abnormal procedure for loss of air data – COMPLETED.

 IF AIRDAT FAIL MESSAGE REMOVED

Procedure completed

 IF AIRDAT FAIL MESSAGE REMAINS

CAUTION

AUTOPILOT PERFORMANCE IS AFFECTED IF AIRSPEED IS INVALID OR

INACCURATE. USE OF THE AUTOPILOT WITH INVALID OR INACCURATE

AIRSPEED SHOULD BE DISCONTINUED.

NOTE

With loss of air data, one or more modes dependent on air data may not be supported

such as ESP high speed, OSP, USP, IAS, VS, or ALT modes.

Procedure completed

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