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selecting a new preselect altitude.
Altitude alerts are inhibited if the glideslope (GS) or FMS glide path (VGP) is captured.
AUTOMATIC FLIGHT CONTROL SYSTEM
Description
Vol. 2 04−10−36
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
FLIGHT DIRECTORS (CONT'D)
Altitude Alert Annunciations
Figure 04−10−30
Altitude Hold Mode
Altitude hold mode (ALT) generates commands to maintain the pressure altitude at the time of
selection. Altitude hold mode commands are based on the baro-corrected altitude of the coupled
side barometric altimeter. When active, a green ALT annunciation appears in the active vertical
field of the flight mode annunciator.
Altitude hold mode is activated by pushing the ALT button on the FCP, or by changing the
preselected altitude while in altitude select track mode (ALTS active).
AUTOMATIC FLIGHT CONTROL SYSTEM
Description
Vol. 2 04−10−37
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
FLIGHT DIRECTORS (CONT'D)
Altitude hold mode is inhibited whenever glideslope (GS) mode is active.
NOTE
If the ALT button on the FCP is pushed during a climb or descent, it
is possible for the aircraft to temporarily overshoot the desired
altitude while the FCCs compensate for the aircraft’s vertical speed
at the moment of ALT mode selection.
The pilot may adjust the altitude reference by pushing the FD SYNC button and manually flying
to the desired altitude. The FD will generate commands to maintain the new altitude reference
upon release of the FD SYNC button.
Altitude hold mode may be cleared by:
• Pushing the ALT button;
• Selecting another vertical mode; or
• Capturing an armed vertical mode.
Altitude Hold Mode
Figure 04−10−31
Vertical Speed Mode
The vertical speed mode (VS) generates commands to maintain a vertical speed reference
value.
Pushing the VS button on the FCP selects the vertical speed mode. A green VS annunciation is
displayed in the active vertical field of the FMA, the selected vertical speed value is displayed in
cyan, and ALTS mode is automatically armed to capture the preselected altitude.
The VS reference value will default to the existing vertical speed at the moment of mode
selection. The VS reference value will also reset to the existing vertical speed whenever the
autopilot is engaged and VS mode is active.
AUTOMATIC FLIGHT CONTROL SYSTEM
Description
Vol. 2 04−10−38
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
FLIGHT DIRECTORS (CONT'D)
The VS reference may be changed by rotating the VS/pitch wheel in the desired direction. The
VS reference changes by ±100 fpm per click. The selected vertical speed reference is displayed
on the vertical speed scale as a cyan triangular bug, and as a cyan digital readout with an
up/down arrow right of the VS indication in the FMA.
The pilot may adjust the VS reference by pushing the FD SYNC button while maneuvering the
airplane to a new VS reference. The FD will generate commands to maintain the new VS
reference upon release of the FD SYNC button.
Vertical speed mode is cleared by:
• Pushing the VS button on the FCP;
• Selecting another vertical mode; or
• Capturing an armed vertical mode.
Vertical Speed Mode
Figure 04−10−32
Flight Level Change Mode
Flight level change mode (FLC) generates commands to maintain either the airspeed/Mach
reference value, or a 100 ft/min vertical speed toward the preselected altitude, whichever yields
the greater closure rate to the preselected altitude.
Pushing the FLC button selects flight level change mode. A green FLC annunciation is
displayed in the active vertical field of the FMA, and ALTS is automatically armed to capture the
preselected altitude.
When FLC mode is selected manually, or by the FMS, the airspeed/Mach reference displayed
on the PFDs (speed bug) is automatically set to the aircraft’s current airspeed/Mach. The
airspeed/Mach reference is also synchronized to the aircraft’s current airspeed/Mach when the
autopilot is engaged with the active vertical mode in FLC. The airspeed/Mach reference can be
manually adjusted using the SPEED knob on the FCP, and is displayed in cyan next to the FLC
mode annunciation.
Automatic transition between IAS and Mach airspeed reference occurs at 33,600 feet MSL.
Mach reference automatically selects when the airplane climbs through 33,600 feet MSL, and
IAS reference automatically selects when the airplane descends through 33,600 feet MSL.
　
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