Hawker 800 XP, Pilot Training Manual

Page: 433 / 504

Selection of VS will cancel ALT, FLC, GA,
VNAV and GS. The VS mode can be cancelled
by depressing the VS pushbutton or by se-
lecting another vertical mode.
As in FLC mode, the AFCS will not fly to an
airspeed reference outside the normal aircraft
flight envelope while the VS mode is active.
ALT (Altitude Hold Mode)
This mode is enabled by depressing the ALT
pushbutton. It mav also be entered by using the
ALT SEL mode described below. A green
“ALT” message is displayed while altitude
hold is active. The reference altitude may be
changed by using the TCS to maneuver to a
new altitude and then releasing the TCS but-
ton. Using the pitch wheel cancels the ALT
mode. Selecting the ALT mode will cancel
the IAS, VS, ALT SEL, VNAV, GA and GS
modes. The ALT mode may be cancelled by
depressing the ALT pushbutton , by selecting
another vertical mode or use of the pitch wheel
ALT SEL (Altitude Preselect)
This mode is enabled by selecting the desired
altitude through the copilot's RI-815 and ini-
tiating a maneuver towards the selected alti-
t u d e . T h e A LT S E L a r m e d m o d e i s
automatically annunciated by turning the blue
"ASEL" in the altitude preselect window white.
The aircraft can be maneuvered toward the
selected altitude using pitch,VS,VNAV, or
FLC. The AFCS will transition to the ALT
capture mode at a point away from the se-
lected altitude which is dependent upon the
vertical speed. The ALT capture mode is an-
nunciated by the green flashing "ASEL" mes-
sage. The green ASEL is flashed for 5 seconds
to emphasize this transition. When the air-
craft has flared onto the new altitude, the sys-
tem will transition to ALT hold and the "ASEL"
will be replaced by the “ALT.”
Note
Changing the selected altitude while
in the capture phase will cause the
active ALT SEL mode to be can-
celled and the ALT SEL mode to
arm. This is indicated by turning the
blue ASEL white.
With the Autopilot not engaged (FD
only) there should be a lateral or a
vertical mode selected for the ALT
SEL mode to arm automatically.
VNAV (Vertical Navigation
Mode)
With the FMS selected for display on the HSI
selected side, activation of the VNAV push-
button will select the Vertical Navigation mode
and overrides all active pitch flightdirector
modes. In the VNAV mode AFCS tracks the
vertical flight profile of the FMS with fol-
lowing submodes possible:
VFLC (Flight Level Change)
VFLC will operate identically to FLC except
that the target speed and the altitude from the
FMS are used for climb or descent. VFLC will
also engage if VALT is engaged and FMS ini-
tiates a climb or descent. A third possible way
to enter VFLC mode is when VALT or VPTH
arm is engaged and the FLC button on the GC-
810 is pushed. The FMS FLC mode is An-
nunciated on the EADI by a green “VFLC”at
the vertical capture location. The target speed
is displayed on the airspeed scale by a magenta
bug.
VASL (Altitude Capture)
VASL will operate identically to ALT SEL
mode. VASL will arm as soon as VFLC or
VPTH is engaged. The FMS ALT SEL arm
mode is also annunciated by turning the blue
"ASEL" in the altitude preselect window white.
Revision 1 16A-9
FOR TRAINING PURPOSES ONLY
HAWKER 800 XP PILOT TRAINING MANUAL
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