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speed. When pushed, the
vertical speed reference is
synchronized to current
vertical speed, displayed
on PFD. Use speed/pitch
wheel to change vertical
value.
CPL Pointer
Illuminates to indicate
whether the pilot's or
copilot’s PFD and ADC
are coupled to the
FGC. Both pointers will
illuminate during an
ILS approach. Defaults
to the left-side PFD on
power-up.
Altitude (ALT)
Preselect Button
Used to preselect
altitude, displayed
on PFD.
Coupled (CPL) Switch
(lateral and vertical
flight guidance)
Used to couple either
pilot's or copilot's PFD
and associated ADC
data to the FGC.
P I LOT T R A I N I N G GU I D E
AUTOMATIC FLIGHT CONTROL SYSTEM
2-14 For Training Purposes Only
Sept 04
FLIGHT DIRECTOR MODES
LATERAL MODES
SWITCH (GUIDANCE PANEL) MODE ANNUNCIATION
HDG Heading Select HDG
NAV Based on displayed navigation source
(VOR, FMS, or localizer) VOR / LNAV / LOC
APR Based on VOR navigation source VAPP
BC Back Course BC
BANK High/Low Bank (HDG or VOR mode only) Eyebrow on attitude sphere (low
bank only)
VERTICAL MODES
SWITCH (GUIDANCE PANEL) MODE ANNUNCIATION
VS Vertical Speed Hold VS
None Automatic Altitude Capture ASEL
ALT Altitude Hold ALT
FLC Flight Level Change FLC
VNAV Vertical Navigation Modes requested by
FMS
VFLC
VASEL
VALT
VPTH
MULTI-AXIS MODES
SWITCH (GUIDANCE PANEL) MODE ANNUNCIATION
Lateral Field Vertical Field
APR Based on localizer navigation source LOC GS
Switch (Throttles)
TOGA Go Around ROL GA
TOGA Takeoff ROL TO
TOGA Windshear Guidance ROL WSHR
For Training Purposes Only
Sept 04
2-15
P I LOT T R A I N I N G GU I D E
AUTOMATIC FLIGHT CONTROL SYSTEM
LATERAL MODES
Roll (ROL) Mode
Roll mode is automatically selected, when no other lateral mode is active, and the
autopilot is engaged. Roll mode generates commands to hold the heading that exists
when the mode is initiated, unless the bank angle upon initiation is over 6° (commands
are then generated to hold the bank angle). The roll mode reference is reset to the
current heading, or current roll angle, upon AP engagement.
Roll mode is annunciated in the lateral capture field on the PFD. Roll mode is cleared
by selecting another lateral mode. ROL will flash for approximately 5 seconds, when
active.
BASIC MODES
SWITCH (GUIDANCE PANEL) MODE ANNUNCIATION
None Roll Hold ROL
None Roll Hold Submode (wings level) ROL
Roll Hold Submode (heading hold) ROL
None Pitch Hold PIT
300
LIM ROL AP1 PIT
SPD VOR VPTH
23500
ATT2
ADC1
20 20
0.88 30000 AP
GX_02_014
P I LOT T R A I N I N G GU I D E
AUTOMATIC FLIGHT CONTROL SYSTEM
2-16 For Training Purposes Only
Sept 04
Heading Select (HDG) Mode
The heading select mode is activated via the HDG switch on the guidance panel.
If the heading bug is turned through more than 180° but less than 360° (airborne), the
FGC will follow the bug all the way around to the target and not turn in the shortest
arc. The FGC provides guidance to the selected target using the shortest arc when on
the ground. The on-ground logic will prevent the airplane from turning in the wrong
direction following takeoff, due to maneuvering the airplane may have done on the
ground.
Bank Mode
While in BANK mode, the roll rate commanded by the heading or VOR modes is
limited to 4°/sec. If the roll angle is less than or equal to 6° when ascending through an
altitude of 35,050 feet, the FGC automatically transitions to the low bank limit of 17°.
If the roll angle is greater than 6°, an automatic bank limit transition will not occur
until the roll angle is reduced to less than or equal to 6°.
When descending through 34,950 feet, the bank limit shall revert to the high bank
limit of 27°, if the roll angle is less than or equal to 6°. If the roll angle is greater than
6°, high bank limit reversion will not occur until the roll angle is reduced to less than
or equal to 6°.
CRS 1 FMS SPD MAN CRS 2
PUSH DCT PUSH DCT
HDG ALT
DN
UP
P
I
T
C
H
Honeywell
FD AP FD
CPL
YD
FLC NAV HDG BANK VNAV ALT
APR VS
BC
PUSH CHG PUSH SYNC
HDG
PUSH SYNC
GX_02_015
N
33
30
6
3
N
33
3
HDG Knob:
Turn to set the heading
bug on the HSI.
HDG Switch:
　
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