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cancel V/L as primary NAV source and will set on-side FMS as
primary NAV source.
Pushing FMS button will toggle the NAV source in the following
sequence:
on-side FMS — X-side FMS — LTRK (if installed) — on-side
FMS or on-side FMS — FMS3 (if installed) — X-side FMS — onside
FMS
DTK
360
HDG
330
N
33
30
W
24
21
S
15
12
E
6
3
FMS1
DTK
360
HDG
330
N
33
30
W
24
21
S
15
12
E
6
3
FMS2
GX_02_028
PILOT’S PFD COPILOT’S PFD
On-Side
NAV SRC
V/L FMS BRG
DTK
030
HDG
360
N
33
30
W
24
21
S
15
12
E
6
3
FMS1
DTK
030
HDG
360
N
33
30
W
24
21
S
15
12
E
6
3
FMS1
GX_02_029
PILOT’S PFD COPILOT’S PFD
X-Side
P I LOT T R A I N I N G GU I D E
AUTOMATIC FLIGHT CONTROL SYSTEM
2-30 For Training Purposes Only
Sept 04
NOTE
If FMS is the primary NAV source, the first push of the V/L button
will set preview NAV source. The second push of V/L button will
cancel FMS as primary NAV source and set VOR/LOC as
primary NAV source.
Pushing FMS button while V/L preview NAV source is displayed,
will cancel preview NAV source.
VERTICAL MODES
Flight Level Change (FLC) Mode
FLC mode is used to climb or descend to a new altitude reference, while maintaining a
calibrated airspeed, or mach reference. FLC mode is selected via the flight level
change switch on the guidance panel and is automatically active. FLC is cleared when
another armed vertical mode is captured.
FGC will generate pitch commands to capture and track the speed reference displayed
on the selected PFD.
If preselect altitude is above the airplane’s present altitude and there is adequate thrust,
FLC mode will climb at the speed reference until preselected altitude is captured. If
thrust is inadequate, FLC mode will hold present airplane altitude until adequate thrust
is applied.
If preselect altitude is below the airplane’s present altitude and thrust is appropriate,
FLC mode will descend at the speed reference until preselected altitude is captured. If
thrust is excessive, FLC mode will decelerate the airplane at its present altitude.
FGC pitch guidance will not generate commands to exceed Vmo or Mmo. When a
potential overspeed condition exists, FLC will command a pitch maneuver to maintain
a speed reference 3 knots less than Vmo or Mmo.
Pushing the SPD PUSH CHG button (inner knob) on the guidance panel while in FLC
mode will toggle the speed reference from Indicated Airspeed (IAS) to Mach or vice
versa. To obtain Mach readout, Mach must be greater or equal to 0.40 M.
CRS
360
HDG
330
N
33
30
W
24
21
S
15
12
E
6
3
FMS1
LOC1
GX_02_027
Preview
NAV Source
Preview
Course
Pointer
For Training Purposes Only
Sept 04
2-31
P I LOT T R A I N I N G GU I D E
AUTOMATIC FLIGHT CONTROL SYSTEM
FLC will command a proportional thrust increase/decrease during small climbs and
descents. In large climbs or descents, FLC will command climb thrust or idle thrust as
required.
Automatic transfer from IAS to Mach speed reference will occur in the climb, above
32,400 feet. Automatic transfer from Mach to IAS speed reference will occur in
descent, below 31,900 feet. Manual transfer can override the automatic transfer by
pushing the SPD PUSH CHG button. There is no auto transfer between IAS and Mach
in MAN speed.
MAN speed selection is accomplished by selecting MAN on the outer knob, and
turning the inner knob on the SPD button. An airspeed bug will follow the commands
from the inner knob, and is located on the airspeed tape of the selected PFD. The
MAN speed bug is cyan and can be in either kts or MACH.
FMS speed selection is programmed in the active flight plan in the FMS. A Mach
speed bug will appear on the airspeed tape of the selected PFD. The FMS speed bug is
magenta and can be in either kts or MACH.
NOTE
For aircraft not equipped with IAC Batch 2 software, FLC climbs
in Mach are prohibited.
For aircraft equipped with IAC Batch 2 software, FLC climbs
above Mach 0.86 are prohibited.
GX_02_030
Selected
Mach
Readout
　
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