
XFR (Transfer)
The center section of the FGC (Figure 16-46)
contains a transfer (XFR) button which is used
to select the desired flight director (left or
right) to command the autopilot. This switch
is also used to select which flight director has
priority. The system defaults to the pilot’s
side at power-up illuminating (green) the left
arrowhead. After power-up, each time the XFR
button is depressed, the arrowhead toggles to
the opposite side. At the top center of each PFD
a horizontal arrow reflects the XFR button
choice. The arrows (3) should normally be
pointing to the side from which the airplane
is being flown.
XFR may be selected before or after AP en-
gagement. However, when XFR is selected
with the autopilot engaged, any flight director
modes that were engaged will be canceled and
the AP will revert to the PIT and ROL hold
modes. Verify the desired side selected on the
XFR button prior to engaging the autopilot.
AP/YD Engage
The autopilot and yaw damper are engaged
using AP and YD select buttons located on the
FGC (Figure 16-46). Each button has a verti-
cal green bar that illuminates when engaged.
When the AP button is depressed, the YD will
also engage, if not previously selected. The YD
can be engaged independent of the AP, but
the autopilot system will not engage without
the YD.
The autopilot can be engaged with bank angles
up to 45° and pitch attitudes b 30°.
If engaged outside of the normal envelope,
the AP will return to the maximum limits of
+ 20° to -10° pitch and + 30° bank.
When the AP is engaged with no flight direc-
tor modes engaged and the roll attitude is
within 6° of wings level, the autopilot will
roll the airplane to a wings level attitude and
hold the existing pitch. This mode is referred
to as the heading hold mode, and will be an-
nunciated on the PFD with “ROL” appearing
in the flight director lateral mode field and
“PIT” in the vertical field.
If the bank is greater than 6° when the AP is
engaged, and with no flight director modes ac-
tive, the autopilot holds the airplane in the
existing bank and pitch attitude. The flight
director command bars will also sync to the ex-
isting attitude and the ROL and PIT annunci-
ations will illuminate.
When the autopilot is engaged, the coupled
side flight director command bars are dis-
played. The uncoupled side’s flight director
may be toggled on/off with the FD button on
the top left/right corner of the FGC (Figure
16-46).
If any flight director modes are selected be-
fore the autopilot is engaged, the AP auto-
matically couples to the selected FD modes.
L E A R J E T 4 5
P I L O T T R A I N I N G M A N U A L
16-81
FOR TRAINING PURPOSES ONLY
FlightSafety
international
IDENT SWITCH
(NOT SHOWN)
ARMING
BUTTON
AP PITCH/ROLL
COMMAND SWITCH
CONTROL WHEEL
TRIM SWITCH
(CWTS)
MIC
SWITCH
(NOT SHOWN)
CONTROL WHEEL
MASTER SWITCH (MSW)
CHECKLIST
LINE ADVANCE
TOUCH
CONTROL
STEERING
(TCS)
Figure 16-47. Pilot’s Control Yoke Touch
Control Steering Button (TCS)