AUTOMATIC FLIGHT CONTROL SYSTEM
Sep 13/2004
Flight Crew Operating Manual
Volume 2
REV 1
CSP 100-6
04-01-05
FLIGHT GUIDANCE PANEL (FGP) (Cont)
SPEED knob
— The rotary SPEED knob changes the IAS/Mach speed reference (FLC mode). The speed knob changes
the bug airspeed or Mach at any time. The integral PUSH IAS/MACH button within the SPEED knob toggles the airspeed
tape between IAS and Mach. The master flight director computes the airspeed reference, and the slave flight director syn-
chronizes to this reference.
VS button
— The VS switch selects vertical speed mode. When activated, the system maintains the vertical speed refer-
ence. The vertical speed reference is set to the current vertical speed at the time of mode selection. After mode selection,
rotation of the DOWN/UP wheel slews the vertical speed reference in the direction of knob rotation. Range is ±8000 fpm.
VNAV (vertical navigation) button
— Pressing the VNAV button arms and then captures the FMS pitch steering com-
mands of the FDs if FMS is selected as the NAV source, the FMS is programmed for a vertical navigation profile, the alti-
tude preselector is set below existing altitude, and the aircraft is within the TOD (top of descent) window or above the
existing altitude for VNAV climb (i.e. VFLC).
ALT (altitude hold) button
— Altitude hold may be engaged by depressing the ALT button on the FGP. When
ALT engages, the FD holds the existing altitude at the time the ALT button was pushed except during a precision approach
with the glideslope captured.
ALT (altitude select) knob
— A preselected altitude is set via the ALT rotary knob. The altitude preselect mode provides
a means for FD/AP to climb or descend to a preselected altitude and then level off and maintain the preselected altitude. If
an altitude deviation (±200 ft) has occurred, the altitude preselect digits will turn amber and flash, press the PUSH CAN-
CEL button in the center of the ALT knob to cancel the flashing. The digits will then revert to cyan.
AP (autopilot) button
— Pressing this button engages the autopilot. Pressing a second time disengages the autopilot.
YD (yaw damper) button
— Pressing this button engages yaw damper. The YD can be engaged independently of
the autopilot, but the autopilot system does not engage without the YD.
XFR (transfer) button
— Selects the desired flight director (left or right) to command the autopilot.
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