BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual page 476

Heading Select
Pressing the HDG button on the flight guid-
ance controller activates the heading select
mode. The mode directs flight director attitude
commands to the EADI to turn to the heading
bug selected on the EHSI.
The pilot or copilot side data provides data to
the HDG function. The CPL button determines
which EHSI and ADC data provides coupling
inputs to the flight director function. Once
coupled, both flight directors operate from
the same heading select control and EHSI
heading bug.
Navigation
Pressing the NAV button activates flight di-
rector attitude roll commands to intercept and
track the navigation course displayed on the
active EHSI. The VOR/ILS mode has an arm
and capture phase that allows a path intercept
and automatic transition into navigation cap-
ture and track. This NAV mode provides lo-
calizer approach if glide-slope tracking is not
desired.
The LNAV (FMS) tracking uses composite
steering signals. The EHSI displays the raw
data. With this mode selected, the FGC arms
until directed by the LNAV (FMS) to capture
and track the steering commands.
Navigation sensor management allows use of
navigation sensor information displayed on
either EHSI. The CPL button selects either
the pilot or copilot EHSI input data. The EFIS
display controller selects the desired naviga-
tion source, such as LOC, VOR, or FMS. The
NAV flight guidance mode uses this naviga-
tion information from the coupled EHSI.
Approach Mode
Pressing the APP button on the flight guidance
controller selects the approach mode. The
APP mode directs flight director and attitude
commands to the EADI to intercept and track
the displayed navigation course on the coupled
E H S I . T h i s e n a b l e s p r e c i s i o n I L S fi n a l
16-64 CL 601-3A/R
CL-600-2B16 PILOT TRAINING MANUAL
approach mode lateral control using a valid
tuned VHF localizer frequency. The approach
mode has an arm and capture phase that allows
setup of a path intercept with automatic tran-
sition into approach capture and track (GS is
also enabled).
For precision approaches using ILS navigation,
the system uses dual sensor information from
both FGCs. The dual sensor phase provides
sensor fail-passive operation through sensor
redundancy management for the final approach
and landing. If one FGC fails, the other FGC
ensures course tracking.
Back-Course Mode
Pressing the B/C button activates the back-
course localizer approach mode. The back-
course mode directs flight director and EADI
roll commands to intercept and track the back-
course side of the localizer. An arm and cap-
ture phase allows an intercept for automatic
transition into a back-course capture.
Back-course mode sensor management allows
selection of the pilot's or copilot's EHSI in-
formation using the CPL button. Back-course
mode arms or engages only if ILS information
(NAV tuned to LOC frequency) has been se-
lected for display on the active EHSI. VOR or
FMS information (NAV not tuned to localizer
frequency) on the selected EHSI prevents the
back-course mode.
Vertical Modes
The vertical modes (Figure 16-60) control the
aircraft movement in the pitch axis. The inputs
direct the aircraft up or down. The vertical
mode functions consist of the following:
FOR TRAINING PURPOSES ONLY
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• Altitude preselect (ALT)
• Vertical speed (VS)
• Flight level change (FLC)
• Vertical navigation (VNAV)
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