Garmin G1000 Manual

							190-00709-04  Rev. AGarmin G1000 Pilot’s Guide for the Socata TBM 850487
AUTOMATIC FLIGHT CONTROL SYSTEM
VNV TARGET ALTITUDE CAPTURE MODE (ALTV)
 NOTE: Armed VNV Target Altitude and Selected Altitude capture modes are mutually exclusive.  However, 
Selected Altitude Capture Mode is armed implicitly (not annunciated) whenever VNV Target Altitude Capture 
Mode is armed.
VNV Target Altitude Capture is analogous to Selected Altitude Capture Mode and is armed automatically 
after the VNV	Key	 is	pressed	 and	the	next	 VNV	 Target	 Altitude	 is	to	 be	 intercepted	 before	the	Selected 
Altitude.	 	 The	annunciation	 ‘ALTV’	indicates	 that	the	VNV	 Target	 Altitude	 is	to	 be	 captured.	 	 VNV	Target	
Altitudes are shown in the active flight plan or vertical direct-to, and can be entered manually or loaded 
from	a	database	 (see	the	Flight	 Management	 Section	for	details).		 At	the	 same	 time	as	“TOD	 within	 1	minute”	
is	 annunciated	 in	the	 Navigation	 Status	Box,	the	active	 VNV	Target	 Altitude	 is	displayed	 above	the	Vertical	
Speed	Indicator	(see	Figure	7-13).
As the aircraft nears the VNV Target Altitude, the flight director automatically transitions to VNV Target 
Altitude Capture Mode with Altitude Hold Mode armed.  This automatic transition is indi\
cated by the green 
‘ALTV’	 annunciation	 flashing	for	up	to	10	 seconds	 and	the	appearance	 of	the	 white	 ‘ALT”	annunciation.		 The	
VNV Target Altitude is shown as the Altitude	Reference	 beside	the	‘ALTV’	 annunciation	 and	remains	 displayed	
above	the	Vertical	 Speed	Indicator.	 	 The	Required	 Vertical	Speed	Indication	 (RVSI)	is	removed	 once	VNV	
Target Altitude Capture Mode becomes active.
At 50 feet from the VNV Target Altitude, the flight director automatically transitions from VNV Target 
Altitude Capture to Altitude Hold Mode and tracks the level leg.  As Altitude Hold Mode\
 becomes active, the 
white	 ‘ALT’	annunciation	 moves	to	the	 active	 vertical	 mode	field	and	flashes	 green	for	10	seconds	 to	indicate	
the	 automatic	 transition.		 The	flight	 director	 automatically	 arms	Vertical	 Path	Tracking,	 allowing	upcoming	
descent legs to be captured and subsequently tracked.
Flash up to 10 sec, Indicating Automatic Transition Altitude Reference (In 
This Case, Equal To 
VNV Altitude Target)
Figure 7-16  VNV Altitude Capture
changing the  vnv  taRget altitUDe
 NOTE: Pressing the CWS Button while in VNV Target Altitude Capture Mode does not cancel the mode.
Changing the current VNV Target Altitude while VNV Target Altitude Capture Mode is active causes the 
flight	 director	 to	revert	 to	Pitch	 Hold	Mode.	 	 Vertical	 Path	Tracking	 and	the	appropriate	 altitude	capture	
mode are armed in preparation to capture the new VNV Target Altitude or the Selected Altitude, depending 
on which altitude is to be intercepted first.
VNV target altitudes can be changed while editing the active flight plan (se\
e the Flight Management 
Section for details).  
						

							Garmin G1000 Pilot’s Guide for the Socata TBM 850190-00709-04  Rev. A488
AUTOMATIC FLIGHT CONTROL SYSTEM
GLIDEPATH MODE (GP)
 NOTE: Pressing the CWS Button while Glidepath Mode is active does not cancel the mode.  The autopilot 
guides the aircraft back to the glidepath upon release of the CWS Button.
Glidepath	Mode	is	used	 to	track	 the	WAAS-based	 glidepath.	 	When	Glidepath	 Mode	is	armed,	 ‘GP’	is	
annunciated	in	white	in	the	AFCS	Status	Box.
Selecting Glidepath Mode:
1) Ensure a GPS approach with vertical guidance (LPV, LNAV/VNAV, LNAV+V) is loaded into the active flight plan.  
The active waypoint must be part of the flight plan (cannot be a direct-to a waypoint not in the flight plan).
2) Ensure that GPS is the selected navigation source (use the CDI Softkey to cycle through navigation sources if 
necessary).
3) Press the APR Key.
 NOTE: Some RNAV (GPS) approaches provide a vertical descent angle as an aid in fly\
ing a stabilized 
approach.  These approaches are NOT considered Approaches with Vertical Guidance (APV).  Approaches 
that are annunciated on the 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.
 WARNING: When flying an LNAV approach (with vertical descent angle) with the autopilot coupled, the 
aircraft will not level off at the MDA even if the MDA is set in the altitude preselect.
Upon reaching the glidepath, the flight director transitions to Glidepath Mode and begins to capture and 
track the glidepath.
Figure 7-17  Glidepath Mode Armed
Once the following conditions have been met, the glidepath can be captur\
ed:
•	 The	active	waypoint	is	at	or	after	the	final	approach	fix	(FAF).
•	 Vertical	deviation	is	valid.
•	 The	CDI	is	at	less	than	full	scale	deviation
•	 Automatic	sequencing	of	waypoints	has	not	been	suspended	(no	‘SUSP’	annunciation	on	the	HSI)  
						

							190-00709-04  Rev. AGarmin G1000 Pilot’s Guide for the Socata TBM 850489
AUTOMATIC FLIGHT CONTROL SYSTEM
Figure 7-18  Glidepath Mode
Command Bars IndicateDescent on Glidepath
Glidepath 
Mode ActiveGPS Approach  Mode Active
Glidepath Indicator
LNAV/VNAV  Approach ActiveGPS is Selected  NavigationSource  
						

							Garmin G1000 Pilot’s Guide for the Socata TBM 850190-00709-04  Rev. A490
AUTOMATIC FLIGHT CONTROL SYSTEM
GLIDESLOPE MODE (GS)
 NOTE: Pressing the CWS Button while Glideslope Mode is active does not cancel the mode.  The autopilot 
guides the aircraft back to the glideslope upon release of the CWS Button.
Glideslope	Mode	is	available	 for	LOC/ILS	 approaches	 to	capture	 and	track	 the	glideslope.		 When	Glideslope	
Mode	is	armed	 (annunciated	 as	‘GS’	 in	white),	 LOC	Approach	 Mode	is	armed	 as	the	 lateral	 flight	director	
mode.
Selecting Glideslope Mode:
1) Ensure a valid localizer frequency is tuned.
2) Ensure that LOC is the selected navigation source (use the CDI Softkey to cycle through navigation sources if 
necessary).
3) Press the APR Key.
 Or:
1) Ensure that GPS is the selected navigation source (use the CDI Softkey to cycle through navigation sources if 
necessary).
2) Ensure a LOC/ILS approach is loaded into the active flight plan.
3) Ensure the corresponding LOC frequency is tuned.
4) Press the APR Key.
Figure 7-19  Glideslope Mode Armed
Once LOC is the navigation source, the localizer and glideslope can be captured.  Upon reaching the glideslope, 
the flight director transitions to Glideslope Mode and begins to capture and track the glideslope.
Figure 7-20  Glideslope Mode
Command Bars Indicate Descent 
on Localizer/Glideslope PathNAV2 (localizer) is Selected  Navigation Source
GlideslopeIndicator
Glideslope 
Mode ActiveApproach 
Mode ActiveActive ILS 
Frequency Tuned  
						

							190-00709-04  Rev. AGarmin G1000 Pilot’s Guide for the Socata TBM 850491
AUTOMATIC FLIGHT CONTROL SYSTEM
TAKEOFF (TO) AND GO AROUND (GA) MODES
In	Takeoff	 and	Go	Around	 modes,	the	flight	 director	 commands	 a	constant	 set	pitch	 attitude.		 The	GA Switch 
is used to select both modes.  The mode entered by the flight director depends on whether the aircraft is on the 
ground.		Selected	Altitude	Capture	Mode	is	automatically	 armed	when	the	aircraft	 is	at	 least	 400	feet	below	 the	
Selected altitude at the time Takeoff or Go Around Mode is selected.
Takeoff Mode provides an attitude reference during rotation and takeoff.  This mode can be selected only 
while on the ground by pushing the GA Switch.  The flight director Command Bars assume a wings-level, 
pitch-up attitude.  Autopilot engagement while Takeoff Mode is active is inhibited while the aircraft is on the 
ground.
Pressing	 the	GA Switch while in the air activates the flight director in a wings-level, pitch-up attitude, allowing 
the	execution	 of	a	missed	 approach	 or	a	go	 around.	 	 Selecting	 Go	Around	 Mode	disengages	 the	autopilot;	
however subsequent autopilot engagement is allowed.  Attempts to modify the aircraft attitude (i.e., with the 
NOSE UP/DN	Wheel	or	CWS	Button)	result	in	reversion	to	Pitch	Hold	Mode.
Figure 7-21  Go Around Mode
Command Bars Indicate Climb
Autopilot Disconnect Annunciation
Flashes Yellow for 5 seconds
Go Around Mode Active
Figure 7-22  Takeoff Mode
Takeoff Mode Active  
						

							Garmin G1000 Pilot’s Guide for the Socata TBM 850190-00709-04  Rev. A492
AUTOMATIC FLIGHT CONTROL SYSTEM
7.4 LATERAL MODES
The following table relates each GFC 700 lateral mode to its respective control and annunciation.  Refer to the 
vertical modes section for information regarding Takeoff and Go Around modes.
 NOTE: The GFC 700 may generate a lower bank angle than the maximum roll command\
 limit in degrees 
indicated in table 7-3 by the amount needed to produce a turn rate equal\
 to or less than standard rate.
Lateral ModeDescriptionControlAnnunciation Maximum Roll 
Command Limit
Roll Hold
Holds the current aircraft roll 
attitude or rolls the wings level, 
depending on the commanded 
bank angle
(default)ROL25°
Low BankLimits the maximum commanded 
roll angle
BANK 
Key*15°
Heading Select **Captures and tracks the Selected 
Heading
HDG 
KeyHDG25°
Navigation, GPS **
Captures and tracks the selected 
navigation source (GPS, VOR, 
LOC)
NAV 
Key
GPS25°
Navigation, VOR Enroute Capture/Track **VOR25° Capture 
10° Track
Navigation, LOC Capture/Track 
(No Glideslope)LOC25° Capture 
10° Track
Backcourse Capture/TrackCaptures and tracks a localizer 
signal for backcourse approachesBC KeyBC25° Capture 
10° Track
Approach, GPS
Captures and tracks the selected 
navigation source (GPS, VOR, 
LOC)
APR Key
GPS25°
Approach, VOR  Capture/TrackVAPP25° Capture 
10° Track
Approach, LOC Capture/Track 
(Glideslope Mode automatically armed)LOC25° Capture 
10° Track
Takeoff
Commands a constant pitch angle 
and wings level on the ground in 
preparation for takeoffGA 
Switch
TOWings Level
Go Around
Disengages the autopilot and 
commands a constant pitch angle 
and wings level in the air
GAWings Level
* No annunciation appears in the AFCS Status Box.  The acceptable bank a\
ngle range is indicated in green along the Roll Scale of the Attitude Indicator.
** The Heading, Navigation GPS and Navigation VOR mode maximum roll comm\
and limit will be limited to the Low Bank mode value if it is engaged.
Table 7-3  Flight Director Lateral Modes
The CWS Button does not change lateral references for Heading Select, Navigation, Backcourse, or Approach 
Mode.  The autopilot guides the aircraft back to the Selected Heading/Course upon release of the CWS Button.  
						

							190-00709-04  Rev. AGarmin G1000 Pilot’s Guide for the Socata TBM 850493
AUTOMATIC FLIGHT CONTROL SYSTEM
ROLL HOLD MODE (ROL)
 NOTE: If Roll Hold Mode is activated as a result of a mode reversion, the flight director rolls wings level.
When	the	flight	 director	 is	activated	 or	switched,	 Roll	Hold	 Mode	 is	selected	 by	default.	 	 This	mode	 is	
annunciated	 as	‘ROL’	 in	the	 AFCS	 Status	 Box.		The	current	 aircraft	bank	angle	 is	held,	 subject	 to	the	 bank	 angle	
condition.
Bank Angle Flight Director Response
< 6° Rolls wings level
6 to 30° Maintains current aircraft roll attitude
> 30° Limits bank to 30°
Table 7-4  Roll Hold Mode Responses
Figure 7-23  Roll Hold Mode Annunciation
CHANGING THE ROLL REFERENCE
The roll reference can be changed by pressing the CWS Button, establishing the desired bank angle, then 
releasing the CWS Button.
LOW BANK MODE
When	in	Low	 Bank	 Mode,	 the	flight	 director	 limits	the	maximum	 commanded	 roll	angle	 to	15°.  Low bank 
arc limits are displayed in green along the Roll Scale.
Low Bank Mode can be manually selected/deselected by pressing the BANK Key while in Heading Select 
or	 Navigation	 Modes	(GPS	and	VOR).	 	 Low	Bank	 Mode	 is	activated	 automatically	 climbing	above	25,000	 ft	
(FL250),	 and	deactivated	 when	descending	 below	25,000	 ft.	 	The	 annunciator	 light	next	to	the	BANK Key 
illuminates while Low Bank Mode is selected.
Figure 7-24  Low Bank Mode Limits
Low Bank Arc  
						

							Garmin G1000 Pilot’s Guide for the Socata TBM 850190-00709-04  Rev. A494
AUTOMATIC FLIGHT CONTROL SYSTEM
HEADING SELECT MODE (HDG)
Heading Select Mode is activated by pressing the HDG Key.  Heading Select Mode acquires and maintains the 
Selected	Heading.		 The	Selected	 Heading	 is	shown	 by	a	light	 blue	bug	on	the	 HSI	 and	in	the	 box	 to	the	 upper	
left	of	the	HSI.
CHANGING THE SELECTED HEADING
 NOTE: Pressing the HDG Knob synchronizes the Selected Heading to the current heading.
The Selected Heading is adjusted using the HDG	Knob.	 	 Pressing	 the	CWS Button and hand-flying the 
aircraft does not change the Selected Heading.  The autopilot guides the ai\
rcraft back to the Selected Heading 
upon release of the CWS Button.
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°	 turn	to	the	 right).		 However,	 Selected	Heading	 changes	
of	more	than	330°	at	a	time	result	in	turn	reversals.
Figure 7-25  Heading Select Mode
Command Bars Track 
Selected Heading
Pitch Hold 
Mode ActiveHeading Select  Mode Active
Selected 
Heading Selected 
Heading  Bug  
						

							190-00709-04  Rev. AGarmin G1000 Pilot’s Guide for the Socata TBM 850495
AUTOMATIC FLIGHT CONTROL SYSTEM
NAVIGATION MODES (GPS, VOR, LOC)
 NOTE: The selected navigation receiver must have a valid VOR or LOC signal or active GPS course for the 
flight director to enter Navigation Mode.
Pressing	the	N AV Key selects Navigation Mode.  Navigation Mode acquires and tracks the selected navigation 
source	(GPS,	VOR,	LOC).	 	 The	flight	 director	 follows	GPS	roll	steering	 commands	 when	GPS	is	the	 selected	
navigation	 source.		When	the	navigation	 source	is	VOR	 or	LOC,	 the	flight	 director	 creates	roll	steering	 commands	
from	the	Selected	 Course	and	deviation.		 Navigation	 Mode	can	also	 be	used	 to	fly	 non-precision	 GPS	and	LOC	
approaches where vertical guidance is not required.
If	the	 Course	 Deviation	 Indicator	(CDI)	shows	 greater	 than	one	dot	when	 the	N AV Key is pressed, the selected 
mode	 is	armed.		 If	the	 CDI	 is	less	 than	 one	dot,	 Navigation	 Mode	is	automatically	 captured	when	the	N AV Key 
is pressed.  The armed annunciation appears in white to the left of the activ\
e lateral mode.
Figure 7-26  GPS Navigation Mode Armed
When	 the	CDI	 has	automatically	 switched	from	GPS	to	LOC	 during	 a	LOC/ILS	 approach,	 GPS	Navigation	
Mode	 remains	 active,	providing	 GPS	steering	 guidance	 until	the	localizer	 signal	is	captured.		 LOC	Navigation	
Mode is armed automatically when the navigation source switch takes place if the APR Key is not pressed prior 
to the automatic source switch.
If	Navigation	 Mode	is	active	 and	either	 of	the	 following	 occur,	the	flight	 director	 reverts	to	Roll	 Hold	 Mode	
(wings rolled level):
•	 Different	VOR	tuned	while	in	VOR	Navigation	Mode	(VOR	Navigation	Mode	reverts	to	armed)
•	 Navigation	source	manually	switched	(with	the	CDI Softkey)
•	 During	 a	LOC/ILS	 approach,	 the	FAF	 is	crossed	 while	in	GPS	 Navigation	 Mode	after	the	automatic	 navigation	
source	switch	from	GPS	to	LOC  
						

							Garmin G1000 Pilot’s Guide for the Socata TBM 850190-00709-04  Rev. A496
AUTOMATIC FLIGHT CONTROL SYSTEM
CHANGING THE SELECTED COURSE
If	the	 navigation	 source	is	VOR	 or	localizer	 or	OBS	 Mode	 has	been	 enabled	 when	using	GPS,	the	Selected	
Course is controlled using the CRS Knob corresponding to the selected flight director (CRS1 for the pilot 
side, CRS2 for the copilot side).
Pressing	 the	CWS Button and hand-flying the aircraft does not change the Selected Course while in 
Navigation	 Mode.		The	autopilot	 guides	the	aircraft	 back	to	the	 Selected	 Course	(or	GPS	 flight	 plan)	when	 the	
CWS Button is released.
Figure 7-27  Navigation Mode
Command Bars Indicate Left Turn 
to Track GPS Course and Climb to  Intercept Selected Altitude
GPS Navigation Mode ActivePitch Hold 
Mode Active
GPS is Selected  NavigationSourceSelectedCourse