P I L O T T R A I N I N G G U I D E
AUTOMATIC FLIGHT CONTROL SYSTEM
2-32
For Training Purposes Only
Sept 04
Pitch Hold (PIT) Mode
PIT mode is automatically selected when no other vertical mode is active, and the
autopilot is engaged. Note that the lateral mode automatically engaged is the ROL
mode. If the pitch angle is greater than 20°, pitch hold mode will reduce the airplane
pitch angle to ± 20°. PIT reference is modifiable (within pitch limits), via pilot inputs
to the pitch thumb-wheel, or by TCS. The FGC will not prevent exceedances of VMO
or MMO in PIT mode.
PIT mode is annunciated in the vertical capture field on the PFD. Pitch mode is cleared
by selecting another vertical mode. PIT will flash for 5 seconds, when active.
The pitch hold mode holds a flight path angle rather than a fixed pitch angle. The
selected flight director pitch angle will change with altitude, configuration and/or
airspeed changes, while climbing, descending or in level flight.
Vertical Speed (VS) Select Mode
VS mode is used to maintain a pilot selected vertical speed reference. FGC will
generate pitch commands to align the airplane vertical rate displayed on the PFD. The
airplane vertical rate is adjustable via the pitch wheel. The pilot may select another
vertical speed reference without canceling VS mode by depressing the TCS button,
and maneuvering the airplane to another vertical speed.
FGC will not generate commands to exceed Vmo or Mmo when in VS mode. When a
potential overspeed condition is detected, VS flight director pitch commands will be
limited to 3 knots less than Vmo or Mmo and MAX SPD annunciation is displayed on
the PFD.
220
LIM
ROL
PIT
AP1
SPD
VAPP
VNAV
23500
ATT2
ADC1
0.88
300
00
GX_02_033
AP
GX_02_034
NO
SE D
N
N
O
S E UP
DIS C
M
ASTER
TCS
Pitch Wheel
Touch Control
Steering
DN
UP
P
I
T
C
H
VNAV
VS
IC
R/T
0.85
320
300
280
260
282
6
4
MAX
SPD
GX_02_035
2992
IN
VS 2500
9500
Vertical Speed
Target Readout
