P I L O T T R A I N I N G G U 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
